MagicLike, (edited ) I don't remember which post it was, that showed the "Publish!" button changed to "🐘💨" (A German one I think), but this is now available as a #Userstyle! :party: :blobcatgiggle:
I also used parts of @me 's custom.css for this - you are in the authors section ^^You can download it here right now! (You may use #stylus for it):
https://userstyles.world/style/9579/special-toot-button