Safari of iOS seems to be improving with every version, and currently has a pretty good standing on privacytests.org
Tweak the default settings for better privacy, add AdGuard, turn on lockdown mode, thrown in a good vpn with NextDNS perhaps, and you’ve a pretty solid browser.
I personally prefer this to brave / Firefox focus on iOS. Their functionality reduces significantly without the ability to customise Lockdown mode for individual websites.
It’ll be interesting to see though, how things shape up once the WebKit restriction is lifted.