Hello LogicalRon ,
Thank you for reaching out to Apple Support Communities.
These steps will l help you pair your AirPods with your iPhone:
"Pair AirPods with iPhone, iPad, or iPod touch
Before you begin, make sure your device has the latest version of iOS or iPadOS installed.
- On your device, go to Settings
> Bluetooth, then turn on Bluetooth. - Open the case with your AirPods inside, then hold it next to your device.
- Follow the onscreen instructions, then tap Done."
More details can be found here: Pair AirPods (1st, 2nd, or 3rd generation)
If you are unable to pair your AirPods, can you provide a few more details? What happens when you attempt to pair the 2nd pair? Which exact iOS version do you currently have? Also, which AirPods Pro do you have?
Cheers!