Free and Open Source Software

I'm trying to better understand how app-to-app communication works within the owner profile alone. I read that apps need mutual consent if they wish to talk with one another, otherwise all apps are isolated from one another.

If that's true, how do I see and verify what consent has been given to an app?

There's obviously "Permissions" but to my knowledge that only gives an app access to sms, photos, etc., not letting one app talk to another. Storage scope is another thing I'm aware of which I can utilize.

I ask this because I need to install a standard predatory work app that has various accesses including location. I tried installing it in another profile and was going to spoof my location but developer options mock location doesn't carry over to the other profiles. So I need to install the app on my owner profile but want to be certain it won't be trying to harvest data from other apps or the system.