Posts under category Facebook Graph API

Recently we moved our Application to use the Business Login for Instagram which improved a lot the experience of our users.
https://developers.facebook.com/docs/instagram/business-login-for-instagram/
The application has been working since the beginning of January 2024, but today we noticed an issue where the connection is failing on the "Step 4: Get the User's Page, Page Access Token, and Instagram Business Account" of the documentation where we're not receiving the list of pages after the user authorization.

User has admin access on some Facebook Business pages and full access on a bunch of pages in the Business Manager.
But https://graph.facebook.com/v18.0/me/accounts call using the user's token is not returning the pages that he has access to via the Business Manager.
Scopes on the token are: read_insights, pages_show_list, instagram_basic, instagram_manage_comments, instagram_manage_insights, instagram_content_publish, pages_read_engagement, pages_manage_metadata, pages_read_user_content, pages_manage_posts, pages_manage_engagement, public_profile
Until yesterday (2/13/2024) all pages were being returned by the /me/accounts call. Since yesterday those pages are not being returned.

I use the Groups API to get new posts made to specific private Facebook Groups. Given the upcoming deprecation of the Groups API, is there any other API support that will allow me to continue to programmatically read new posts made to these Groups?