Apple Watch Blood Oxygen not checking frequently
apple watch o2 check
is there anyway to make the Apple Watch check oxygen several times a day. Sometimes it never checks
Did you already have a look at the related article? If your am is moving, there will be less automatic measurements, but you can always start it manually:
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The Blood Oxygen app will occasionally measure your blood oxygen levels if background measurements are on. This will usually happen when you are not moving.* Depending on how active you are, the number of readings collected each day and the time between these readings will vary. Blood oxygen measurements use a bright red light that shines against your wrist, so it may be more visible in dark environments. If you find the light distracting, you can turn off background measurements.
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copied from: How to use the Blood Oxygen app on Apple Watch - Apple Support