Hi becandvair
welcome to the Apple (user-to-user) Community.
Re: Low volume in 2nd generation airpods
Resetting the AirPods was a good move, even though it hasn't helped.
Wondering if your phone has the newest update installed, so that the AirPods firmware is automatically also up-to-date.
You might want to check the volume level on the AirPods themselves:
Pause, skip, and adjust volume with your AirPods and AirPods Pro - Apple Support
You may be able to fine-tune the settings on your phone:
Customize headphone audio levels on your iPhone or iPad - Apple Support
or
You might want to experiment with the different noise-control modes:
Change the settings of your AirPods and AirPods Pro - Apple Support
AirPods Pro and AirPods Max Active Noise Cancellation and Transparency mode – Apple Support
Adjust the volume of sound effects for AirPods – Apple Support
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Other Resources:
AirPods Support Website:
Find all the topics, resources, and contact options you need for your AirPods....
AirPods Support - Official Apple Support
AirPods Repair & Service - Apple Support
AirPods User Guide – Apple Support
All the best :-)