Is it possible to help or encourage our local municipal services to have either an RSS or BlueSky feed? At this point, it's becoming apparent that putting all the information eggs in the twitter basket is/was a bad idea. This is a place where open source standards should shine.

The most practical way would probably be to create that feed yourself based on their Twitter feed. You could automate it using some Nitter-like service (please do not scrape public Nitters, but you can run your own Nitter and scrape it as you like). It is generally easier to do something like this yourself than to convince someone else, who does not care at all, to do it. I don't know how you would advertise it.