I would say that IOS AdBlocking is significantly less effective than that which you’d expect from a Desktop adblocker (and presumably android, so I’ve heard— can only speak for iOS though). My little brother likes to watch Anime on his iPad through some bootleg Crunchyroll equivalent (the kind of website that uses a .to domain, you know?), and I’ve tried my absolute damndest to defeat the hyper-intrusive ads and scripts served by that site so he can watch his Naruto or whatever without having his poor innocent eyes bombarded with salient requests from hot singles in our area.

No luck, and not for lack of trying. I’m not entirely certain what feature is missing in WebKit that results in the hamstringed adblocking capacity, but it’s definitely much worse than you’d hope for. You can get adblocking extensions on iOS that will block ads on most websites, but when it comes to the truly shady ads that do not even try to masquerade as being legitimate, iOS falls short. It’s likely something I could handle on the DNS layer if I wanted to dedicate a day or two towards, but I’ve similarly travelled down that rabbit hole to no avail as well.

There is also Firefox Focus. Been using it on iOS since it came out a few years ago.

It integrates as an ad blocker for Safari, so I don't actually use Firefox itself (since as you mentioned, all browsers on iOS are just a wrapper to Safari anyways).

I just browse using Safari and ads are blocked by Firefox Focus. Pretty neat.