[Question] Does a selfhost Social Management service exist?

I work for a local club we have some rarly used Social Media accounts. But we have also the problem our head does work voluntary and some - like me and not only me - do not like facebook instagram or tiktok. But we have to work with these tools.

We need a selfhosting, web accessibility tool that allows a club to send posts to several social media services and allow also to manage comments social media independent.

In best case it made social media management that easy that I could get also a Fediverse account.