iPhone battery health keeps degrading

iPhone XR sales ended in September of 2021, which makes that initial 97% remarkable.

If you’ve had the battery recently replaced, or purchased this as a refurb, contact the provider / seller.

If this is the original battery, then it’s headed for replacement as it reaches 80%, as mentioned above.

The iPhone XR was released in 2018 so the battery is 5 years old now. The best you can do is get a new battery when it gets to 80% or less.