Studio Display Presets are missing, only colour profiles and not able to change brightness

The option for presets for my studio display is missing in the Systems Settings displays tap.

You can only select colour profiles like on a normal monitor.

The brightness can no longer be adjusted.

It seems to be stuck in a last selected reference preset (maybe r709) where you can't change the brightness.

I connected the monitor to my iMac and everything was normal with the presets etc.

I am very reluctant to re-install my system as I have a lot of software licences and would have to reinstall them.

Does anyone have any advice?

Or maybe how to reset colorsync? I think it is related to this.

I have tried using calibrite profiler and white point settings to get the monitor to work very well.

I'm not sure, but I think the problem came with the Sequoia update...

Unplugging the monitor for a long time did not help.

Thanks in advance