There are, but sadly those are japanese games. You can try Tenhou, there's a decent explanation on how to use it, in english, for those who cannot read japanese.

Thanks!

Also you can try Sega Mj.

Not on steam but It's the only one I've honestly played (Unless we're talking about the real deal.) http://www.4windsmj.com/intro.htm

Sorry for necroposting, but currently there is mahjong soul https://mahjongsoul.yo-star.com/
Online multiplayer mahjong in English