New AirPods firmware version 4.2 is now available for every AirPods model with no known changes beyond bug fixes and reliability updates.

Wesley Hilliard for AppleInsider:
Previously, the AirPods Pro had firmware version 4.0 (4A402), a slight change from the previous 4A400 build. Third-generation AirPods had version 4.1 4B66. The new update is version 4.2 with build number 4C165 for every AirPods model including the AirPods (second-generation), AirPods (third-generation), AirPods Pro, and AirPods Max.
The new firmware is installed automatically for users, with no mechanism available to manually force an update. As long as AirPods or AirPods Pro are in a charging case and connected to an iOS device, the firmware will install by itself.
MacDailyNews Note: To check your current firmware for AirPods and/or AirPods Pro, with them connected to your device:
• macOS: menu > About This Mac > System Report > Hardware > Bluetooth > Devices > AirPods name > Firmware Version
• iOS/iPadOS: Settings > General > About > Select the AirPods
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No, Apple didn’t release 4.2 for all models.
Quit copying and pasting other site’s info – esp when it’s wrong!
Exactly! My version 1s don’t rate
I have been getting the “not your AirPods Pro” message for months, virtually every time I try to quickly check my battery levels forcing me to re-connect. As nice as noise-cancellation, the tacticle pause button and “Hey Siri” are, the Pros have been a downgraded experience compared to my gen 1 AirPods.
Nick: I am in complete agreement. However, the gen. 3 versions are superbly comfortable with spatial sound processing and almost double the battery life. They are a bargain. I’ve already gifted them to 4 family members. Costco has them for $10 less than Apple.
Watching movies on Apple TV+ or an iPad while wearing them is fantastic.
Forgot to mention: the iPod Pros are not comfortable for me, even with the smallest silicone tips they are too snug and hurt in my right ear.
Darn, I meant AirPods, not iPod. Sorry.
My Max updated