SocialFeeder.Net
This is a simple tool that didn't exist, as far as I can tell, so I made it.It lets you download all the accounts that you follow on Bluesky or Mastodon as an OPML file so they can be imported into an RSS reader and you can keep up with your microblogs together with your news.
No information is stored on this server.
Please let me know if you find this useful or find any bugs.