This WordPress plugin provides a very simple slider block which is based on Swiper v8. The plugin provides a UI for the most common swiper options (navigation, pagination, slides per view). But it is specifically made to be extended via PHP. Therefore, it provides many PHP filter hooks to change its behaviour.
The plugin is used in some custom themes and through it's PHP configuration it's perfect for a locked-in design (eg agency, clients). Through the filters it's also very easy to extend in your own functions.php file.