AdGuard (local app) works in Safari. I don't like safari, but the AdGuard blocking does not work in FireFox! I use DDG browser mostly and it works well. I do see the occasional ad.
The whole browser situation in iOS is really user unfriendly.
Firefox is another nice alternative if you have a good Android phone I guess.
Sadly, I have a quite old Android device (but its battery life it's still good) where Chromium-based browsers are already quite slow and Firefox feels even slower and drains the battery faster (the old Fennec was worse than the new one, it hanged for 30 seconds).