Do you leave the Find My app running in the background? Can you completely close out the Find My app as shown here 👉 How to Force Close an app. ? Once completed and Find My is force closed then check the performance of the iPhone again.
If the above does not work then Try and Force Restart your iPhone EXACTLY as shown below and see whether that resolves the issue:
- Press and quickly release Volume UP button
- Press and quickly release Volume DOWN button
- Press and Hold the SIDE button until an Apple logo appears and then release the Side button (Can take up to 20 seconds. (DO NOT release Side Button when invited to Slide Power OFF).
Axel F.