Legion Go - Fixed GPU clock not working with Simple DeckyTDP

I have a Legion Go with SimpleDeckyTDP isntalled. If I enable it to overwrite the normal Steam TDP controls I can succesfully change the TDP to a higher level than 15W. However, if I enable Fixed GPU clock, the slider to change the MHZ values does not appear.

The now deprecated steam patch suggested the following:
https://github.com/corando98/steam-patch?tab=readme-ov-file#gpu-slider-not-working