Update: July 3rd 2023
The path is mostly free of snow, with only two short sections on the Champex side of the col still covered. Furthermore, the previously missing chains have been restored, greatly assisting in navigating areas affected by small landslides.
Original post (June 10th)
Choosing the alternative high route (up to ~2650m) to the TMB from Champex Lac may not be advisable at this early stage of the season. As soon as the ascent began, there were sections where the path was completely overgrown, and snow appeared around 2100m. The conditions felt unsafe with just microspikes and trekking poles, given the exposure and the hard snow. Additionally, some chains were missing in lower areas without snow (they may be reinstalled in a few weeks), which would have been helpful. Opting for the low route is likely the best option until the snow clears.