With Lemmy 0.19, you can simply block instances in your profile settings. Even if you didn’t block, Threads posts wouldn’t show up on here because the Lemmy format wouldn’t handle them well. It’s mostly a concern for micro blog platforms like Mastodon.
I mean hey, anything’s better the iOS lol. I don’t think rooting is a good idea, but anyone running a custom aosp ROM is an ally of mine. We custom ROM users gotta stick together!