I think it'll be tough to find that corner of it... I think I saw a conservative community on lemmy.world but the platforms original purpose was to get away from the big, controlling, capitalist social media platforms the likes of Twitter, Instagram, reddit, etc. Like mastodon, the largest part of the fediverse (I'm pretty sure), grew alot when twitter was brought by Elon, and more moved after he messed up the platform enough, saying they'll create their own platform where hate won't be allowed. It's kinda against it's nature to have much conservative-ness.
Not trying to be rude as based on how this sounds, you seem nice enough and not crazy, but places like mastodon are basically the left's version of "Truth social" where people are pretty ok with saying "I don't want those thoughts spread here" those thoughts they don't want are usually things like homophobia or transphobia, but those are fairly common on the right even if you don't share them.
It's an interesting thought and would probably be alittle healthier, but hey you're still here being able to provide that counter point of view
People forget projects like this are done for fun. They put a lot of polish and organize it well enough that it looks professional, but just like this, it can be a single dev working on it on their free time. its super easy to create a project, get busy, and just fall off. They're allowed to do that, plus while there's always more stuff to do, even the existence of this app is already impressive, so I thank them for the work, and until I decide to start coding during my free time instead of playing video games or watching TV, I try not to be disappointed when a project slows or even dies.
I hope the original dev is doing good, I thank them for their work, and congratulations on the twins, hope everything is going well for them, and hope they only come back when they feel ready, not when they feel forced to