In TSW2020 the Mastery didn’t work for me on PlayStation at all and now that it’s added to TSW2 it seems to be hit and miss. tier1 of GWE mastery is do 10 miles and complete one service or scenario. Tonight I ran one of the class 31 services from the diesel legends dlc and it registered complete one service but the 10 miles part didn’t even though I ran the full length of the route. im playing on PS5
In my game on the ps4 the mastery for Hamburg-Lubeck is not working you need to drive 1 service for the 112 and i have 7/1 but it show the bar is full but doesn't unlock the reward.
Even if you complete it I am not sure what you unlock. Tier 1 is supposed to be dioramas? TSW2 is missing the button in the route menu to change dioramas. Tier 2 is overlays for activating additional scenery in the route.
hamburg lubeck mastery is working and it gave me a big wheel and it turns round in a fairground i play on PS 4