Voyager made this website and probably added these URLs as supported links.
I am not on voyager, but on thunder and it does not work, since there links are not the standard share link. I tested using normal links in a comment and it works there.
So while in theory Thunder could add support for these Links, I really just whished that Voyager would stop advertising themselves whenever somebody shares a link with their client.
The actions of Voyager seem malicious; no other Lemmy (or mastodon client) that I know of does not directly link to the post in question and rather just advertises itself like an adfly page.
That makes way more sense. I would question it, since my client (Thunder) manages the same without requiring to rewrite the URL.