Hello @Micahjah and welcome to the Community. Please try the following path. Tap on your device/battery icon in the upper left of your app > Charge 4 tile > swipe up to SpO2 in your app list > tap Uninstall.
Laurie | Maryland
Sense 2, Luxe, Aria 2 | iOS | Mac OS
Take a look at the Fitbit help site for further assistance and information.