The comics are a mixed bag - worthless at the worst, though fantastic when they’re good. There’s a sliding scale in fandom’s mind about what content is the most important, for adhering to canon, which goes something roughly like:
- Just the OT
- ^+ the ST
- ^+ the PT
- ^+ the anthology films
- ^+ the more mature TV shows (Clone Wars and Rebels)
- ^+ the supplementary web show stuff
- ^+ books, comics, games, etc
All editors are targeting a point somewhere on that scale, with the other important metric being quality of the film they’re outputting.
I’m a comic reader so I absolutely get a little mental niggle when I see some reference to canon which a fanedit I like no longer uses - like that Padme’s death one, or having Cornelius Evazan seen on Jedha when he’s not in my version of Rogue One. BUT, I’d always prefer to have a great movie which generates a niggle in a comic over having the movie slavishly adhere to every little element of canon.
I think the TV shows are important enough though to carry a lot more weight when considering whether or not to include something in your fanedit movie canon.