Are query parameters in the "source" of redirects still not allowed?

Question

Are query parameters in the "source" of redirects still not allowed to this date for Firebase? Answer on Redirects on firebase with "?" query parametres states it wasn't, but that was back on 2016.

Answer 1

It's still not supported. If it was, I would expect to see something specific about it in the documentation. The docs all state that the path is what's relevant, not the query string.