Bizarrely when I do that it tells me “uBO Lite is not supported by this version of Safari”.

On an iPhone 13 with the latest version of iOS.

I’m very new to the Apple ecosystem so it could well be that it’s meant to work on a laptop/desktop rather than the mobile version.

I could of course be wrong: does anybody know better? Or is it a case of me being frazzled after work?

EDIT: some users have suggested upgrading to iOS 18.6 solves this problem. Doing it as we speak!