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.
One can mask this landscape into the background of that shot:
https://i.pinimg.com/originals/75/c1/1b/75c11b8ae85a1c727c5b20b081beff2a.jpg
Showing that Kylo Ren’s slaughter happened below Vader’s Castle, perhaps even where Anakin fell at the hands of Obiwan.