Empty <Partner> Stamps category appears when user is not on AllowList

[erichfi]

Overview
When a partner has an AllowList (and no other custom stamp), users who are not on the AllowList still see an empty <Partner> Stamps category. This behavior causes confusion, as the section appears without content.

Steps To Reproduce

1. Go to the <Partner> dashboard.
2. Ensure you are not on the AllowList for this partner.
3. Click on the "Stamps" section in the profile.
4. Scroll down to view the <Partner> Stamps category.

Observed behavior
The <Partner> Stamps category appears, but it is empty because the user is not on the AllowList and there are no other custom stamps.

Expected behavior
The <Partner> Stamps category should be hidden entirely if the user is not on the AllowList and no other stamps are available for this partner.

Screenshots
N/A (can be added if necessary)

Additional context
N/A