Game Instances cannot have replicated variables and have no network functionality. Blueprint lets you mark any property as replicated, but that doesn’t not mean it will actually replicate.
The ONLY classes that support replication in Blueprint are actors and their components, even then, there are rules about what actors replicate to whom. I’d suggest having a good study of the multiplayer sample projects and some of the community reading materials.
Also as a moderator note: please do not make seperate posts for every image, you can have multiple images in the same post.