[zigg]

You don't happen to have USB-C Max, do you?

Just a thought. Those, AirPods 4, and of course Pro 2 are the only AirPods with rev 7 firmware. All other AirPods are on rev 6.

Both my AirPods (1st gen Pro and Lightning Max), which no longer have audiogram options in Custom Audio Setup since iOS 18.1, are all rev 6.