The canon still exists - they’re called books
And I might remind that those books were continually being updated and revised both by jrr as well as christopher
As they're both dead, official canon is set.
Just one item that's egregiously wrong is that Gil-Galad had no right to offer a trip West to anyone. The Valar themselves invited every elf everywhere (except a few whose actions/oaths precluded accepting) to come to Valinor and live there forever.