I wish the Super Smash Bros Lemmy was more active. I wanted to message the owner to offer to mod because Sunspider helps with Lemmy.world and has their hands full probably but can't figure out how to do that on Jerboa.
SSB is one of the first video games I ever played and I've been active for over 20 years in this series. The Nintendo Switch does not make it easy to pull my files so it's a little harder to save and post clips unlike BotW or other games
I'm not familiar with Jerboa (I'm still kinda waiting on mobile apps to develop more), but you may try messaging them by logging in via browser instead.
From there you should be able to navigate to the community, tap the sidebar button, scroll a little to see their name at the bottom, tap it & see their profile & an option to message them.