1. https://firehose.directory
2. https://atproto.at/relays
3. https://atproto.wiki/en/wiki/reference/core-architecture/relay
4. https://pulsar.feeds.blue
5. https://leaflet.pub/12022731-ae4f-4a13-9f7a-5738b7a83c2e
Of those results, Google only has 3, the only one on the list that... doesn't have a list of public atproto relays. None of the other sites are present anywhere. Trying not to assume malice instead of incompetence here, but it's really ironic that one of the ecosystems with the strongest ties to the open web, with users creating dozens of new websites every week, isn't getting indexed.
Why don't these people/companies think about how hard it will be to search for their $thing !?
https://atproto.at/robots.txt is good and findable with a direct search
https://atproto.wiki/robots.txt is empty but findable on Google.
https://pulsar.feeds.blue/robots.txt is 404 and thus not indexed by Google.
https://leaflet.pub/robots.txt is good. A logged in google search for this finds this for me.
Tell the people at https://pulsar.feeds.blue to fix their robots.txt if they want to get indexed.