Join button does not appear for friend's world even with online permissions enabled.

The Join button does not appear on my main account even though all multiplayer and online settings are enabled. I tested with a newly created account on the same device and everything worked normally — the Join button appeared without issues. However, on my main account, the Join option is missing. When I enter my world, my friends also cannot see the Join button. Sometimes invitations do not reach them, and when they do, they experience very slow resource pack/mod loading.

The videos I'm attaching will show you that I recorded the screen from both my phones simultaneously, and they clearly illustrate what I mean. Therefore, please resolve the issue.Because I've been suffering from it since August of last year