I've dug around this topic a bunch and my take is straightforward: if you're asking about 'realm scans' as a scanlation group, their fan-made releases are usually distributed outside official channels and aren't the legal way to support creators. That said, there are plenty of legitimate places to read similar series or official translations that keep the creators and publishers paid.
Start with publisher-backed platforms: Manga Plus and VIZ's Shonen Jump app host tons of officially licensed chapters for free or via affordable subscriptions. Kodansha's K Manga, Crunchyroll Manga, and ComiXology also carry many series, and they often release simulpub chapters the same week Japan does. For webcomics and manhwa, Webtoon, Tapas, Tappytoon, Lezhin, and Manta are major legal hubs. International ebook stores like BookWalker, Kindle, and Kobo sell volumes if you prefer collected editions.
If you want physical copies, local bookstores or online retailers like Right Stuf and Barnes & Noble are solid. Libraries can surprise you too—apps like Hoopla and OverDrive sometimes carry licensed manga. Personally, I feel much better reading on these platforms because I know my clicks help the people who made the work, and the quality is usually cleaner than scanned pages.