I just did a quick search for "Virus Scanner" and this was in the first 10 results:

https://apps.apple.com/au/app/phone-protection/id1282949977

Pretty clearly fake reviews, what it provides seems like a complete scam, in app subscriptions - ticks all the boxes from that article!

Four years on and it's still happening. Pretty incredible. Apple largely justifies its 30% cut as providing a curated experience, which is hard to reconcile with this reality.