Autolinking behaviour depends on the apps you’re using. Plenty of apps autolink .world, the app I’m using doesn’t autolink anything at all.
I’m just using the default web interface and I don’t think the link generation is from my browser. I think it’s on the side of lemmy, but I could be wrong. Using any mobile app could easily overwrite that behaviour though.
I think that just means the devs haven’t bothered to update their TLD lists in a while.
Yep, someone else also suggested that. Might be that or see my reply to that for futher thoughts.