MS Edge used to support ePub ebook reading, but that is being removed. So you will need a dedicated eBook reader app.

I mentioned BlueFire which I like and use in iOS and Windows 10, but just found a good page with some other interesting apps.

Calibre, the first one in the list, is quite nice but a bit more complex for a new user, or someone who only wants to read. (BlueFire would work well for that, and it does access DropBox accounts to load ebooks too).

Various good options here: https://beebom.com/best-epub-reader-windows/