Can I have two different games join the same session?

Well, I finally got it to build for Android, and it doesn’t seem to be able to see any of the PC sessions like it could when they had the same code base, and the PC version doesn’t seem to be able to see the Android’s session when the Android is hosting.

What do I need to do? I’d like to preserve that feature in the PC version but having cross-platform is more important to me so if I have to drop the 2 weeks of work I did getting that feature to work then I will. But I hope someone can tell me a way that 2 different builds can play together.