I have not tried this, but here is what I am guessing:
I believe Paratext runs in 64-bit code.
Up until just now, the Surface Pro X could only emulate and run 32-bit code EXEs.
I believe the new Surface Pro 9 with 5G is the ARM version and apparently it does emulate 64-bit Intel code. So it should be able to run Paratext. (This 32-bit limitation was a major reason why I didn’t purchase a Surface Pro X.)
I hope someone with one of these new devices can let us know for sure.