Is a Lake Manasarovar bath compulsory or allowed ?

Is a Lake Manasarovar bath compulsory or allowed?
No.
The water is extremely cold, and the lake sits at a very high altitude, so we don’t recommend taking a bath at Lake Manasarovar. Moreover, these days Chinese authorities don’t give permission to take a bath in Lake Manasarovar. So we will just touch the water and do meditation at Lake Manasarovar.
A ritual bath is a personal religious decision and should never be treated as a requirement for completing the pilgrimage.