I’ve been using Kagi for a while. Unfortunately, its website on mobile is much lower quality than say DDG. One issue I find often is that when I want to edit a previously-entered query in the search box, sliding the text cursor is very hard – it often stops at search box boundary and doesn’t scroll the text inside. Another is that sometimes the search results page freezes after I come back to it from a different tab. When I try to scroll, it refuses to scroll and only briefly shows some white space around the currently-viewed part. I blame all those on some JS that’s too creative for its own good.
Aside from that, I wish Safari had a setting to add custom search URLs, so that I can paste my Kagi auth token, instead of having to use xxSearch, which also has some annoyances. Obviously, this part is not Kagi’s fault.
I’ve stopped using Kagi on mobile and went back to DDG. It’s still stellar on desktop though.