Compute Module CM4 - GPIO ports

Hello, i have a question regarding the Raspberry pi Compute Module 4, does someone knows how many GPIO are available and accessible under RISCOS ?, when I check the HAT documentation, I see extension of GPIO ports (Standard 2 → 27) and extension (28 → 45), but when reading official raspberry pi CM4 documentation, I can’t see any reference to those extra GPIO’s , I see only reference to cemare ports, display ports..etc…
As I need at least 34 GPIO’s for a specific project, I see only the RPI CM modules to fulfill my needs…

One of the earlier cm IO boards had ridiculous numbers of GPIO pins.