Ref: https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-revision-codes

Highlighted note reads

All Raspberry Pi computers report BCM2835, even those with BCM2836, BCM2837, BCM2711, and BCM2712 processors.

By reference to this recent Forum thread, this statement no longer appears to accurately explain the situation.

https://forums.raspberrypi.com/viewtopic.php?p=2321101#p2321088