@flsounds for what’s worth, also toot! does that. I think it could be because of the “optimized” keyboard setting that replaces the return key with @ and #
Going into the “numbers” keyboard brings out the return key (I just noticed it!), so that could be the best work around.
Plus you have to click that to go to the punctuation keyboard, which will reveal the enter key even without entering it.
@flsounds I think so? It has been bugging me. I didn’t realize that the enter key is in the number layer until you pointed it out. I just assumed that I couldn’t use the enter key on mastodon.