REVVEL 6 5g- Files

I am trying to give access to files however, it doesn't let me. it keeps saying 0 of 0 apps. And I can't open files on GroupMe or any app that I need to open files on. I already updated the app, restarted the phone, restart the app preferences, uninstalled and installed the app, etc. What else can I do? and it's a brand new phone.