My experience is from 10 years ago, but we had some good walking and old skool MTB hols around Chamonix and Aosta. In Cham we walked on the other side of the valley from the Mont Blanc Massif and did plenty of lower level MTB (VTT) in that area too. The same in Aosta, plenty of Alpine walking around there and biking at lower levels that were graded like in the UK (ie by distance rather than technical difficulty). Not sure what it’s like these days with the new cable car assisted DH stuff, but those old easier XC routes must still exist for the Euro masses, it can’t all be just big bikes and full face helmets, the like of which appears in all the UK mags these days.