This does not actually show posts made on bsky. Those would link to bsky.app.

However, there is currently no easy way to read bsky posts without an account. Although this is now a priority for bsky devs.

Not easily. You could run through the big instances (mastodon.online/social, hachyderm etc etc) but there are quite a lot of reasonably large ones, and also some interesting people either use extremely niche ones or have their own single-user instance.