You can often find them in specialized manga stores. These stores usually have a section dedicated to yaoi manga. Another option is online retailers like Amazon. They have a wide range of yaoi graphic novels available. Some local comic book conventions may also have vendors selling yaoi manga books.
You might try looking in some dedicated manga subreddits. Some popular ones are r/Manga and r/YaoiManga. Check the pinned posts or do a search within those communities.
Sure, Yaoi manga is very real. It typically focuses on romantic and sexual relationships between male characters. These mangas are created and consumed by many people around the world.
You could start by looking on anime-specific platforms such as VRV or Hidive. Sometimes, local cable channels or on-demand services also offer manga series. Just do a bit of searching and you'll likely find something that suits your needs.
Try looking on dedicated manga subscription services such as Crunchyroll Manga or Comixology. They often have a wide range of titles available, including Jinx.
You might also check out subscription-based services like Netflix or Hulu, which sometimes offer manga series. Just search for what you're interested in and see if it's available.
Some public libraries offer digital access to manga for free. You could also check out apps that have a limited selection of free manga from time to time.