Might common banking, airline apps not work?

[AnotherElk]

@Kickstand

Does that mean, for example, my bank’s app or an airline’s app probably would not work?

Those Apps most probably are dependent on underlying Google services (Aurora Store would list them as GSF-dependent in this case) which /e/OS doesn’t have and tries to mimic with the integrated microG. Such Apps might work on /e/OS at some point in time, they might not work on /e/OS at some other point in time.

@AnotherElk

If you really, really need your banking App (or any Google-dependent App for that matter), in Custom ROM territory you would be better off using LineageOS in connection with the genuine Google services (installed e.g. via Open GApps ) and Google’s registration of devices running uncertified Android OSes for the legitimate use of Google services at https://www.google.com/android/uncertified