Inserting them relies on people building tools using those services' APIs to watch for them and send them. (This is what Brid.gy does btw if you'd like to help or see how it's done.) Hop into the IWC online #dev chat channel for more specifics and others' opinions/ideas.

For other upcoming events:
Scheduled events can be found here (regular weekly Homebrew Website Clubs): https://events.indieweb.org/
Potential sessions here (you can propose your own too!): https://indieweb.org/2021/Pop-ups/Sessions
Others in planning: https://indieweb.org/Planning

See you in a few hours.