https://www.dropbox.com/downloading?build=182.3.6318&plat=win&type=full&arch=arm64
I installed this on my Surface Pro X (SQ2) model and it did install. It does take a bit to install the first time… if it fails, just try to run it again and it should go. But it looks to be running OK so far.
Anyway… so now you’re not just limited to OneDrive on Surface Pro X and Surface Pro 9 ARM64