With release of iPadOS15.4, dynamic volume controls were added as a feature for existing models of iPad capable of supporting this feature. The feature could be optionally enabled (or subsequently disabled) if desired from iPad settings.
Use the Home, side, and other buttons on your iPad - Apple Support
New models of iPad launched to market after release of iPadOS 15.4 (iPads Air5, mini6) were not able to disable the dynamic controls. The 2022 11” and 12.9” iPads Pro and the iPad10, also released since introduction of iPadOS15.4, are reportedly also unable to disable this feature. It is therefore feasible to presume that dynamic controls are similarly a standard element of the physical UI of these new models.
Apple have not updated their documentation to indicate that the 2022 iPads Pro and/or iPad10 are similar in implementation within the iPad Air5 and mini6. Hopefully Apple’s documentation will provide needed clarity in due course.
Apple do invite submission of constructive feedback and feature requests via its Product Feedback portal:
Feedback - iPad - Apple