I’m pretty sure the Bedrock and Java servers work independently from each other, and I think the features they share were possibly ported over from one server to another
If I’m not wrong, this applies to maps and lobbies; for example an EggWars map that’s on CubeCraft Java can be implemented into CubeCraft Bedrock as the blocks themselves exist in both versions (and the only difference might simply be how the blocks are identified)
I think there are also other things that can be moved over from Java to Bedrock (and vice versa) like perhaps game mechanics, but it’s complicated to do so because Java and Bedrock work differently from each other, and especially because of the newer game framework on CubeCraft that I heard about
In terms of physical servers, it could be possible that Java and Bedrock share some space, but I honestly have no idea
I should mention that I’m no expert on this, this is all that I happen to know; feel free to correct anything here that could be inaccurate