I have an iPhone, and I have recently been using Brave. Firefox is a favorite.
I use Firefox everywhere else, but for my Android I’m on Brave.
Sure, adblock and tab grouping is a plus but my main reason I use it (i.e. over Firefox) is because of memory. When I have six FF tabs open, my Samsung model shoots at least three down the moment I enter another activity or open a new tab. They survive on Brave.
I’d still use Brave on iOS devices too – as another commenter said, it’s a webkit reskin but at least it’s got good Adblock.