The Time Display in the top right of the map screen seems to be soley dependend on the player having the the ItemWatch - any custom watch, even CDLC watches will not enable the time display on the map screen.
Instead, this display should be based on the items config, for example isWatch, alternative, maybe the existing "CfgWeapons >> "vn_b_item_watch" >> "simulation" config could be checked for "itemwatch"?
Additionally, it would be nice if other items like GPS or Drone Terminals enable the time display on the map screen, even without wearing a watch.