Hello @traceykb and welcome to the Community. Your SpO2 is part of your Today stats that you see by swiping up on your screen -- Help article.
If you don't see anything, make sure the SpO2 app is installed. Tap on your profile picture > Charge 5 > Gallery > keep the toggle on Charge 5 scroll down and look for SpO2. If it isn't installed, move the toggle to Apps and search for SpO2 and install it. Please be aware that this feature isn't available in every country.
Laurie | Maryland
Sense 2, Luxe, Aria 2 | iOS | Mac OS
Take a look at the Fitbit help site for further assistance and information.
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