I assume you mean Mastodon seems much more mature than Lemmy?

Yeah, I'd agree with you there. I've had zero issues trying to find people and content on Mastodon, while I have had federation issues with Lemmy. And I do use the official Mastodon app.

My only gripe with Mastodon is that it isn't obvious that you should follow hashtags. I didn't know this at first and struggled to get into it with post after post complaining about Elon, but once I figured out to follow hashtags, I like it now. I'm just annoyed that all the artists I follow on Twitter are flocking to Threads and Bluesky instead of Mastodon though.