It's such a weird thing to be concerned about though. Your phone automatically updates apps by default so they can suddenly look different later. And even then, so what? If the change was malicious just stop using it? Apps are sandboxed, websites are sandboxed, you'll be fine.
What's worse is that there's practically no process to report any sort of rulebreaking, so someone could be mining crypto or running a residential proxy [1] through the mobile game I've been playing, and I'd be none the wiser.
Not that it doesn’t occasionally happen, but at that point you’re trying to dodge the police… as compared to there being no police in the first place.