Seems so to me. I’m on lemmy. I can see it just fine

Does it not give you a link field? It shows up for me as a text link in the body of the post.

And at least on my client (Connect), trying to tag a community in the title doesn’t work, it just shows the link markup raw.

Also your hashtags are links back to mastodon. I don’t think those are useful for Lemmy users.