Proposal. When you elect a congressperson you get a little program for your phone, or on a dedicated device. It's basically a tamagotchi avatar of your congress person. You can feed them, and they can send you messages and their votes show up like little achievements so you can praise or scold them.
If you neglect them too much they "die" and your vote is withdrawn. If they loose too much confidence (too many let them die) they are out of office and there is a special election.
And it sounds a lot like gods work in Terry Pratchett's #Diskworld. They only exist when people believe in them. The get smaller and less powerful when less people believe in them (and if i recall the aren't that anyway)
For those of you grieving the communities you've lost on other platforms...
You're not starting from scratch, you're starting from experience.
You know who you are, and you know what you need. You already have a vision of what a healthy supportive community looks like, now you just have to cast about and draw those people together.
And you are doing that on a platform of people so excited to reach out and find YOU too.