Xbox Game Pass PC and Minecraft Dungeons

I have Xbox Game Pass and was able to download and install the game on 2 computers. My kids want to play with each other but when they sign in, it says that they don’t have access to the game. Does this mean only one can play at a time on PC and that they’d have to use my Xbox ID? They can play together with no problems on the Xbox but would rather use keyboard/mouse and access on computers would be better. Is this the way it is intended to work? I have to have game pass tied to my kids account instead of mine? I wouldn’t question it other than the fact it works fine on the Xbox one. Thanks for the help.