Pixel watch 4 spo2 doesn't work

[MikeFeek]

Got my watch a couple of months ago, and despite the proper amount of sleep, I have never gotten a reading. Is there something I need to turn on in settings to make it work?  The only metric I get is resting heart rate, nothing else. 

[MaCrisGBFitbit]

Hello @MikeFeek!  Welcome to our community forums! 

I'm sorry to hear that your Google Pixel Watch 4 is not tracking your SpO2. 

To receive the SpO2 readings please keep in mind the following:

• Your device doesn’t retroactively measure your SpO2 values. When you start using Fitbit SpO2, you’ll see dashed lines until after your next sleep session.
• You must get at least 3 hours of quality sleep. Data is only collected when you’re still. If you move a lot during your sleep or the sleep session is too short, you might not get SpO2 data.
• Charge your Google Pixel Watch 4 to make sure it’s able to collect data throughout your entire sleep session. 
• Note that it may take around an hour for your SpO2 values to appear after you sync your device. 
• Turning off any SpO2 clock face or app permissions can cause the feature to stop functioning. For instructions on adjusting permissions, see How do I install and manage apps on my Fitbit device?
• Your watch must be able to consistently track your SpO2 data:
• Wear your device slightly higher on your wrist.
• Make sure your device is in contact with your skin.
• Your device should be snug but not constricting.
• Tattooed skin can impact the accuracy of the red and infrared sensors on your Fitbit device.

[MikeFeek]

I'm a little restless when sleeping. Working on getting something I can sleep on comfortably, major back issues. I reset my watch. I do manage to be somewhat still a few hours. Weird that I've never gotten a reading at all.