Google or Apple it's a company that may have their own rules and criteria and that's why we have to choose the open source platforms for installing apps unfortunately not many options are available so we stuck with either this or that but both are terrible when it comes to secure their users from these kind of events and irony is Apple claims that they are most secured platform won't talk about anything similar to these.
Developer that is in his right sense will rather create a veritable landing page or website for people to download his open source software than put it in Google play store. I don't know for Apple store but there aren't much crypto app on their play store because of their strict rules and verification of app submission and also government policy on crypto ruling. A page enough for people to let user download for PC and windows, even Apple can be downloaded on the website, verified with a signature but running apple, you will have to enable developer mode on the settings but of course it comes with a caution.
There was a time metamask and Apple store were having some misunderstanding and when I check some conditions Apple gave them, you will understand that these companies want crypto money but doesn't want to entertain cryptocurrency but I hope by the time it get the widespread adoption, it wouldn't be too late for them.