The VO2max strip tile was opt-in, so accounts that already sync a
cardio-fitness sample from Withings, Apple Health, Fitbit, or Oura saw
nothing on the dashboard. Default the strip tile on; it still self-gates
on having a VO2_MAX sample, so empty accounts keep a clean tile strip.
The chart row stays off — VO2max charts live on /insights/cardio-fitness.