I confirmed with Apple Support on 10/1/2022 that the BlueTooth versions on the AirPod Pro 2 and the iPod Nano 7th generation are incompatible. You can pair the devices, but you will not get any sound on the Nano. There is no way to upgrade BlueTooth 4.0 on the Nano to meet the requirements of the AirPod Pro 2. Hope this helps.
SeattleSue
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