Well, there are several options. Some people find it on official manga platforms like Shueisha's Manga Plus. Another choice could be local libraries that have a manga collection. Just make sure you're accessing it legally.
There are several options. One of them is to check out official manga subscription services such as Shonen Jump. Another possibility is to search on well-known manga aggregator websites, but make sure they have the legal rights to distribute the content.
You can read it on some popular manga reading platforms like MangaDex or Webtoon. They have a wide range of manga collections, including One Punch Man.
You can try some popular manga reading websites like MangaReader or MangaPark. They often have a wide range of manga available, including One Punch Man.