make sure you don't have anything else preventing pop ups and such. an authentication message could be getting blocked.
Also, make sure chrome doesn't have any updates, same with the iOS. doing quick research, it seems chrome browser is only compatible with iOS 12.2 and newer so in theory it should be able to work fine. Can you get it to work on another mobile device like your phone or something?
yes, on phone (ios 18.6) all work fine. I can login and play LS to without any issues. I complete reset this iPad and try it a second time with both browser but same issue. Cloudflare verify dont work.