I don't have a Thinkpad myself. From what I found quickly, it should be possible. Tech specs: https://psref.lenovo.com/syspool...
M2 interface is only a PCIe 3.0 x 4, so the full speed of the SSD will not be used, but since the M2 is backwards compatible, I don't see a technical problem. If the unit is still under warranty, the HD swap may void the warranty. Tech manual for this model: https://download.lenovo.com/pccbbs...