What conceivable commercial purpose of Lenovo is served by making it difficult for people to install operating systems other than Windows 10 on their laptops?
Every OS they support costs money in developer time. It's a commercial trade-off what Operating Systems to support.
Put it this way, do you see lenovo or Dell or HP developing drivers for OpenBSD? there's no commercial ROI on that, so they don't
In this case it would appear that Lenovo don't think there's a commercial reason to help out with Linux drivers.
It would be interesting to see how this is achieved in other pc's in the signature edition range : https://www.microsoftstore.com/store/msusa/en_US/cat/categor...