Some libraries offer digital manga collections that you can access. Also, there are certain apps that provide unblocked manga, but make sure they are from legitimate sources to avoid any legal issues. For example, Comixology is a popular option.
I wouldn't recommend looking for unblocked manga sites as they often violate copyright laws and can be risky. It's better to use legal and authorized platforms to enjoy manga.
For a great manga reading experience, you could try Viz Media or Comixology. They have licensed content and reliable servers. But remember, always respect copyright and choose legal platforms.