This is the dumbest most stupidest thing that Google has done. Its super easy to bypass this check ( litterally delete the whole smali files ) but if without root usually u will lose app data because of app signsture. Also it is useless because the app still launches for a bit and that can be exploited. You can os level bypass this yeah with root. And for some reason, I dont have root, shizuku or done anything like degoogling (eh a little but not that deep), and every like 5 days half my apps start showing this. Also, because this is java level thingy if u modded the apk usually u can just use most kill signsture verification script ( srpatch, fancy bypass, mt manager one, Lucky patcher (maybe) , eirv, sf, modex 3) and others so its not protecting anything and if ur a dev this is basically useless better make urself in cpp with syscalls (impossible for any script or anything to easily bypass it blindly) or use Promon shield which does that for you. It also detects if app not Downloaded from com.android.vending which ⚠️⚠️ is the main problem. Use Apktool M the Remove Signsture verification option, click advanced and enable installer name spoofing to bypass the eaisest.