Can you name few app from app store than turned to be scam, somehow harmed users device or were used to steal users funds. I havent heard that there were any fake or scam apps (during last years) in app store. User can jailbreak (if it is even still possible) and install app, or install a trusted app (I think that latest firmwares closed that option already). But scam from app store - dont believe that something can sneak from moderators.
Fake electrum app, fake atomic wallet app and many like that, if you want to be knowing about fake apps on playstore, you can enable notification in the scam accusation board, you will see how their are fake apps, some are not cloned but are fake, some people will see it, download it, generate fake wallet that the hackers can be able to move the fund there to their address if any address on the wallet is funded. There are fake apps, it is real, I have seen many on playstore.