[Feature-Request] New visibility-Setting for Spaces

I would love an additional visibility-setting for spaces or even a more granular setup.

If you have a lot of Public spaces, the Feed gets cluttered quickly. That is especially frustrating, if you aren't interested in some topics and might become a reason to leave the community altogether since you are not ably to "unfollow" that space.

My idea would be a setting for a public room to still be easy to join but the posts inside are only visible to those who are in it.

Alternatively a private space with the option to auto-join without waiting for approval, maybe only a short questionaire like "have you read the rules and accept".