diff --git a/invenio_oauthclient/ext.py b/invenio_oauthclient/ext.py
index 8c54dca..291c811 100644
--- a/invenio_oauthclient/ext.py
+++ b/invenio_oauthclient/ext.py
@@ -2,6 +2,7 @@
 #
 # This file is part of Invenio.
 # Copyright (C) 2015-2018 CERN.
+# Copyright (C) 2024 Graz University of Technology.
 #
 # Invenio is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -10,6 +11,7 @@
 
 import warnings
 
+from flask import request
 from flask_login import user_logged_out
 from flask_principal import identity_loaded
 
@@ -205,3 +207,74 @@ def init_app(self, app):
 
         app.extensions["invenio-oauthclient"] = state
         return state
+
+
+def finalize_app(app):
+    """Finalize app."""
+    override_template_configuration(app)
+    init_index_menu(app)
+    post_ext_init(app)
+
+
+def override_template_configuration(app):
+    """Override template configuration."""
+    template_key = app.config.get(
+        "OAUTHCLIENT_TEMPLATE_KEY",
+        "SECURITY_LOGIN_USER_TEMPLATE",  # default template key
+    )
+    if template_key is not None:
+        template = app.config[template_key]  # keep the old value
+        app.config["OAUTHCLIENT_LOGIN_USER_TEMPLATE_PARENT"] = template
+        app.config[template_key] = app.config.get(
+            "OAUTHCLIENT_LOGIN_USER_TEMPLATE",
+            "invenio_oauthclient/login_user.html",
+        )
+
+
+def init_index_menu(app):
+    """Init index menu."""
+    menu = app.extensions["menu"]
+
+    def active_when():
+        return request.endpoint.startswith("invenio_oauthclient_settings.")
+
+    def visible_when():
+        return bool(app.config.get("OAUTHCLIENT_REMOTE_APPS")) is not False
+
+    menu.submenu("settings.oauthclient").register(
+        "invenio_oauthclient_settings.index",
+        _(
+            "%(icon)s Linked accounts",
+            icon=make_lazy_string(
+                lambda: f'<i class="{current_theme_icons.link}"></i>'
+            ),
+        ),
+        order=3,
+        active_when=active_when,
+        visible_when=visible_when,
+    )
+
+    menu.submenu("breadcrumbs.settings.oauthclient").register(
+        "invenio_oauthclient_settings.index",
+        _("Linked accounts"),
+    )
+
+
+def post_ext_init(app):
+    """Setup blueprint."""
+    app.config.setdefault(
+        "OAUTHCLIENT_SITENAME",
+        app.config.get("THEME_SITENAME", "Invenio"),
+    )
+    app.config.setdefault(
+        "OAUTHCLIENT_BASE_TEMPLATE",
+        app.config.get("BASE_TEMPLATE", "invenio_oauthclient/base.html"),
+    )
+    app.config.setdefault(
+        "OAUTHCLIENT_COVER_TEMPLATE",
+        app.config.get("COVER_TEMPLATE", "invenio_oauthclient/base_cover.html"),
+    )
+    app.config.setdefault(
+        "OAUTHCLIENT_SETTINGS_TEMPLATE",
+        app.config.get("SETTINGS_TEMPLATE", "invenio_oauthclient/settings/base.html"),
+    )
diff --git a/invenio_oauthclient/finalize_app.py b/invenio_oauthclient/finalize_app.py
deleted file mode 100644
index e3d3c34..0000000
--- a/invenio_oauthclient/finalize_app.py
+++ /dev/null
@@ -1,30 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# This file is part of Invenio.
-# Copyright (C) 2023 Graz University of Technology.
-#
-# Invenio is free software; you can redistribute it and/or modify it
-# under the terms of the MIT License; see LICENSE file for more details.
-
-"""Finalize app."""
-
-
-def finalize_app(app):
-    """Finalize app."""
-
-    override_template_configuration(app)
-
-
-def override_template_configuration(app):
-    """Override template configuration."""
-    template_key = app.config.get(
-        "OAUTHCLIENT_TEMPLATE_KEY",
-        "SECURITY_LOGIN_USER_TEMPLATE",  # default template key
-    )
-    if template_key is not None:
-        template = app.config[template_key]  # keep the old value
-        app.config["OAUTHCLIENT_LOGIN_USER_TEMPLATE_PARENT"] = template
-        app.config[template_key] = app.config.get(
-            "OAUTHCLIENT_LOGIN_USER_TEMPLATE",
-            "invenio_oauthclient/login_user.html",
-        )
diff --git a/invenio_oauthclient/views/client.py b/invenio_oauthclient/views/client.py
index 23beae0..29c7007 100644
--- a/invenio_oauthclient/views/client.py
+++ b/invenio_oauthclient/views/client.py
@@ -39,28 +39,6 @@
 )
 
 
-@blueprint.record_once
-def post_ext_init(state):
-    """Setup blueprint."""
-    app = state.app
-
-    app.config.setdefault(
-        "OAUTHCLIENT_SITENAME", app.config.get("THEME_SITENAME", "Invenio")
-    )
-    app.config.setdefault(
-        "OAUTHCLIENT_BASE_TEMPLATE",
-        app.config.get("BASE_TEMPLATE", "invenio_oauthclient/base.html"),
-    )
-    app.config.setdefault(
-        "OAUTHCLIENT_COVER_TEMPLATE",
-        app.config.get("COVER_TEMPLATE", "invenio_oauthclient/base_cover.html"),
-    )
-    app.config.setdefault(
-        "OAUTHCLIENT_SETTINGS_TEMPLATE",
-        app.config.get("SETTINGS_TEMPLATE", "invenio_oauthclient/settings/base.html"),
-    )
-
-
 @blueprint.route("/login")
 def auto_redirect_login(*args, **kwargs):
     """Handles automatic redirect to external auth service.
diff --git a/invenio_oauthclient/views/settings.py b/invenio_oauthclient/views/settings.py
index f5ebae4..0968f02 100644
--- a/invenio_oauthclient/views/settings.py
+++ b/invenio_oauthclient/views/settings.py
@@ -2,6 +2,7 @@
 #
 # This file is part of Invenio.
 # Copyright (C) 2015-2018 CERN.
+# Copyright (C) 2024 Graz University of Technology.
 #
 # Invenio is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -10,13 +11,8 @@
 
 from operator import itemgetter
 
-from flask import Blueprint, current_app, render_template, request
-from flask_breadcrumbs import register_breadcrumb
+from flask import Blueprint, current_app, render_template
 from flask_login import current_user, login_required
-from flask_menu import register_menu
-from invenio_i18n import lazy_gettext as _
-from invenio_theme.proxies import current_theme_icons
-from speaklater import make_lazy_string
 
 from ..models import RemoteAccount
 from ..proxies import current_oauthclient
@@ -32,21 +28,6 @@
 
 @blueprint.route("/", methods=["GET", "POST"])
 @login_required
-@register_menu(
-    blueprint,
-    "settings.oauthclient",
-    _(
-        "%(icon)s Linked accounts",
-        icon=make_lazy_string(lambda: f'<i class="{current_theme_icons.link}"></i>'),
-    ),
-    order=3,
-    active_when=lambda: request.endpoint.startswith("invenio_oauthclient_settings."),
-    visible_when=lambda: bool(current_app.config.get("OAUTHCLIENT_REMOTE_APPS"))
-    is not False,
-)
-@register_breadcrumb(
-    blueprint, "breadcrumbs.settings.oauthclient", _("Linked accounts")
-)
 def index():
     """List linked accounts."""
     oauth = current_oauthclient.oauth
diff --git a/setup.cfg b/setup.cfg
index e9759d1..c38f8f7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -86,7 +86,7 @@ invenio_base.secret_key =
 invenio_i18n.translations =
     invenio_oauthclient = invenio_oauthclient
 invenio_base.finalize_app =
-    invenio_oauthclient = invenio_oauthclient.finalize_app:finalize_app
+    invenio_oauthclient = invenio_oauthclient.ext:finalize_app
 
 [build_sphinx]
 source-dir = docs/