hello when are we having diablo 4 on mudfish
hope there is diablo 4 soon!
No problem. 
As a workaround, you should use one of the methods at Unsupported Games while Diablo 4 item is missing.
And if you want to see it officially at Mudfish, please send me some game packets using Packet Capture with Mudfish link while playing the game with Full VPN mode.
I need some game packets to register for a new game.