@Upruzzinga said in Lenovo model that is two years older than the M10.:
be flashed with this UBTouch image and then used as a Linux smart device similar to the Ubuntu Touch M10?
Very, very unlikely and there is a risk you'll brick it.
Phones and tablets differ a lot more than PCs do. Each device needs its own installation file and if there isn't one, it's generally not a good idea to flash one that is meant for a different device.