This will enable phishing campaigns on an unprecedented scale.
Many people will lose their funds because they do not know where to download wallet APKs and verify PGP signatures.
I check Microsoft Store now I did not see Electrum.
I understand you, that there will be fake apps to scam people. But I do not think so. According to what I read about the one for European Union, if the all has FinCEN, state banking, or MiCA license, it will continue to be on the app store.
I think something like that will also be for people living in United States.
That means those exchanges apps might be the one thriving on Playstore which are close source apps. This will give kire waye for close source apps on the Store.