Well, currently, the Star Wars comics that are officially part of the canon are those that have been approved and overseen by Lucasfilm. This includes titles like 'Star Wars: Darth Vader' and 'Star Wars: Doctor Aphra'. These comics expand on the existing Star Wars universe while adhering to the established lore and continuity.
The main Star Wars comic series published by Marvel Comics are often considered canon. Also, some comics directly tied to the movies and TV shows fall into this category.