Available App Assignments to User Groups not Showing in Company Portal of Certain Devices

Hello! I've searched a lot on the issue of Company Portal displaying "No available apps," but the solution seemed to mostly be 'assign apps as available to user groups instead of device groups and wait 8-12 hours.'

However, I can confirm that the apps are assigned correctly. I can see on Intune Admin Center that there are available applications listed for this device. We have synced, reset, repaired and reinstalled Company Portal.

What should I be looking for? What else could cause Company Portal to disconnect?

Thank you!