That happened to me as well, I put it down to "fucking password manager, it's broken again".
For example, BitWarden has spent the past month refusing to auto fill fields for me. Bugs are really not uncommon at all, I'd think my password manager is broken before I thought I'm getting phished (which is exactly how they get you).
Yeah i could totally see how someone in a bind working off of phone could get p0wned like that
For me it wasn't even a phone, it was on the desktop, I'm just so used to everything being buggy that it didn't trigger any alarms for me.
Luckily the only things I don't use passkeys or hardware keys for are things I don't care about, so I can't even remember what was phished. It goes to show, though, that that's what saved me, not the password manager, not my strong password, nothing.