Think I have the answer. Would be nice if someone can confirm.
I’m two weeks in the mountains, trail running without any regular runs. Recent Vo2max calculations are needed for training status calculations. Vo2max isn’t determined during trail running activities, only regular running (and other sports?).
You are correct. Only regular runs (and cycling with a power meter) will generate VO2Max. While Trail Running and other sports will generate Training Load, it needs a VO2Max figure within the last 2 weeks to generate Training Status.