Hey ShovelforSale,
A good first step whenever anything is not behaving as you expect, is to restart the iPhone using “slide to power off”, which can often clear up issues. This explains how: Restart your iPhone
If you still see this screen after restarting, share some more details, such as:
- What app or feature are you using when this appears.
2. What happens when you tap on dismiss
3. Which iPhone and exact version of iOS you have
Also, the notification may come from the device being placed into lost mode using the Find My app. In order to confirm, can you sign into the Find My app on the device using your Apple ID and check that the device has not been placed into lost mode.
You can find more info about lost mode using this article: Use the Find My app to locate a missing device or item
Let us know how it goes!
Best regards.