Samsung has already partnered with Microsoft in the past to make WMR headsets, and that did not prevent Windows 11 from dropping support for the device. The very same could happen to a Android-based headset.
And additionally, Samsung never released their Odyssey VR (or it's successor) worldwide, which in my opinion was the reason WMR failed as it was the best of the WMR headsets at the time of their release (of course the HP Reverb was better, but it came out much later).
I wonder if Samsung has secured promises of commitment. IIRC they required Google to commit to improving Android's support for tablets before committing to devices like the Z Fold.