My opinion, Covid delayed everything, including physical music releases and still affects pretty much all sorts of things.
That aside with this band, those that didn’t give a shit before still don’t and those that did probably give less of a shit now.
I doubt royalties are stopping it as those things are usually hashed out in the beginning and I’m sure several lawyers were involved. The guys in a band making music is long gone and the business partners in GNR will do what’s good for their interest in the business.