Oh yeah, and if anyone so inclined wishes to add a distant Vader’s castle to the reverse shot when Kylo picks up and looks at the Wayfinder, I won’t try to stop you.
However cool that would be, it’s not necessary, and I’m happy merely to namedrop Mustafar in the crawl. That’s enough to tie it into Vader and make sense why there were two: one for the master and one for the apprentice.