The phone app (com.android.dialer), allows you to record your calls. It provides a button on its screen for the active call, and pressing that button starts recording the current call.
I have seen that other custom ROMs based also on LOS and using their default apps, have a version of the call app, which has the option to automatically record the calls, saving you from having to press the button mentioned above.
The Custom ROM I have seen that feature is crDroid 6.10 for the Xiaomi Mi A1 (tissot).
Would it be possible to make that modification to the phone application that uses /e/OS, to have that option?