PMUSR If you install apps in a User Profile. Would they appear in Owner Profile too in Settings under "Apps"?
Yes, they appear that, but you won't be able to edit their permissions or other settings from the owner profile.
PMUSR Im thinking of using Obtainium to install as much apps I can from but I want to use VPN in all profiles but then I cant install Obtainium in Owner Profile when its already installed in User Profile to install that VPN app. The VPN app is the only app I need in Owner Profile. Should I install Obtainium in the Owner Profile then install all apps I need via Obtainium in the Owner Profile then push those apps to User Profile? Does that setup affect the security in any way? How should I do?
You can have the same app installed in multiple profiles. When you update the app in one profile it'll get updated across all user profiles. However, the user data of the app in the different profiles remains completely separate.
You could install Obtainium in either of the owner profile and the secondary user profile or in both profiles. It's up to you, and you're free to set that up as you wish.
All apps are sandboxed in GrapheneOS and there's
no difference in the security of apps installed in the owner profile or the secondary user profile, aside from the fact that you can log out (end session) of secondary user profiles without restarting the phone.