I am working on integrating the Facebook Graph API with my application to read posts/comments from customer Pages. The app is set up in Live mode in the Meta for Developers portal. Despite following the recommended setup procedures, I'm facing persistent issues when trying to access Page data using a system user.
Setup Details:
App Configuration: My app is in Live mode on Meta for Developers. Business Manager Setup: In my Facebook Business Manager, which already manages a Page, I've created a system user with admin permissions and linked it with my app. System User and Permissions: I assigned the Page as an asset to the new system user admin and generated a non-expiring token with various permissions (business_management, pages_show_list, read_insights, pages_read_user_content, pages_read_engagement). Token Testing: When testing the token in Postman with a GET request on /me/accounts, I continually receive an empty data response.
Even though the system user has admin permissions and the correct token, I am unable to fetch any Page details ({"data": []} response in Postman). I am uncertain if the issue is in the app configuration/permissions setup or within the Facebook Business Manager's system user settings.
Even if, in Postman, if I GET: v19.0//feed I get: "Unsupported get request. Object with ID '' does not exist, cannot be loaded due to missing permissions, or does not support this operation"
I'm trying to enable Facebook Business users to add a system user to get an access token for reading their Page posts and comments by my app. I need insight into what might be going wrong—could it be an issue with the App configuration or permissions, or is it on the Facebook Business Manager side?
Any advice, insights, or similar experiences would be appreciated.

Hello, I'm trying to use the /me/leadgen_forms route but it's giving me the error "Requires pages_manage_ads permission to manage the object, the app may have the permission but in order to use this API, the app needs to be owned by a verified business" on specific pages, there are pages that work normally, but on some it gives me this error, my application already has the permission mentioned and my business is verified (I use it to send the official WhatsApp api)

Able to send whatsapp via cloud API but not create a template via API?
has anyone come across this issue no issue with account permissions no issue with auth token no issue with roles i was able to do this yesterday and all of a sudden i receive attached error:

I am trying to mention the user when replying to their comment on my page post. I am using the following endpoint https://graph.facebook.com/v19.0/136580295900502_2467377823447413/comments?access_token= req body: { "message" :" hello @[7132049906831253] test v19 from postman. " }
but in the reply comment posted on facebook, the PSID is replaced by the name of the user but it is not clickable.

Related to bug: https://developers.facebook.com/support/bugs/1096399604832261
The /me/accounts endpoint is still not returning pages, even when the app has the advanced business_management permission, as required for v19.0 API.
Works fine for app admin, but not for regular user.