it already has, the fork is named Liftoff and many people seem to like it.

https://tosdr.org/

it still retains iOS iconography, including the share button.

when an app is open source, it virtually always has a link to the source code somewhere in the Settings or About section.

Mastodon. I got to a point where it's actually getting difficult to catch up with what people I follow have posted while I've been asleep.