I can’t get them to connect to my iPhone

Try these solutions:

1. Turn off the Bluetooth and turn on it again
2. Try resetting your AirPod by following Apple's official guide: How to reset your AirPods and AirPods Pro - Apple Support
3. If neccessary, restart your iPhone.
4. If none of these solutions works, take your device to the nearby Apple Store to aks for the help of Apple technician.

Have you tried resetting the Air Pods?

How to reset your AirPods and AirPods Pro - Apple Support