How do I update my AirPods to the latest firmware?
My AirPods are not showing the latest firmware. How do I update?
[Re-Titled by Moderator]
AirPods Pro
About firmware updates for AirPods - Apple Support
Find your AirPods firmware version
Firmware updates are delivered automatically while your AirPods are charging and in Bluetooth range of your iPhone, iPad, or Mac that's connected to Wi-Fi.
There is no way for you to trigger it.