@Mtt As @manton pointed out, we need more than just a link. Micro.blog would have to ask the visitor where they want to go. Similar to what Mastodon does when you're trying to reply from a server you're not logged in to:

Mastodon shows a modal window with the title Reply to Matt Langford's post. The text says: With an account on Mastodon, you can respond to this post. You are not logged in to this server. Where is your account hosted?