Well that's disappointing. How hard can loading PGN data be? The only way to accomplish this is to manually configure the game. That's not a thrilling solution.
Can you sync "vs CPU" games across devices?
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The platform compatibility should not be an issue. It only needs to transfer a small data set. Just allowing you to import PGN files into CPU games would be a simple (even if less than perfect) solution. There's no inherent issue with moving simple data from platform to platform.
Online games are already synced.
Can you sync "vs CPU" games across devices? I'd like to pick up games I started on my iPad on my Android phone. I think it's strange that you can't even load a PGN file.