If you’re talking about the extension that looks like an R with a green arrow, the author passed away a couple years ago. https://github.com/einaregilsson/Redirector/issues/329
The repo has a new maintainer but there’s been no new releases since the maintainer doesn’t have access to the extension release pages. No surprise that a MV3 version hasn’t been worked on.
It still works on Firefox, though.
Hopefully the new maintainer can get releases going again. It’s a great extension!