As someone who has recently switched from Android to iOS, I can tell you uBlock Origin Lite on Safari on iOS is a poor man’s imitation of the real uBlock Origin on Firefox on Android.
How does it compare to 1Blocker? I use that in Safari and also a VPN when I'm away back to my home connection so it uses my NextDNS which also blocks a lot of in-app ads.
are there major sites that don't work for you?
Oh definitely! I know you’re just using the phrase and don’t imply otherwise, but to clarify the word “imitation”, uBO lite is not a fake imitation but actually an official thing from uBO and Raymond Hill: see https://github.com/uBlockOrigin/uBOL-home