Is it a supported device? 

There is always a delay after a new Apple pad/phone is introduced before it supports Trueplay. Sonos will execute multiple tunings over multiple devices (likely hundreds) in order to characterize the acoustic performance of the new device. Typically this has required a few weeks. This process cannot start until the phone/pad is released into the marketplace.

M4 gen 7 pro was released in May 2024. Surprised it’s not supported yet.