Cannot control speaker volume on Yoga Pro 7 14AHP9 (AMD, Realtek ALC287)

[nlgranger]

Hi,
I just bought a Yoga Pro 7 14AHP9 which has a Realtek ALC287 controller. Everything works just fine sound-wise (maybe thanks to your work?) except for one small detail: the speaker volume control has no effect, the effective volume remains at 100% regardless of the set value EDIT: the volume goes from 0 to 100% in the first few pixels of the slider.
Headphone volume control works fine.

I tried setting the volume via pipewire (-pulse) and directly in alsamixer. The PCM volume slider does control the volume, but not the Speaker slider.

By any chance do you have any insight on this small issue?

alsa-info.txt

[nlgranger]

Actually I'm pretty sure this is a driver configuration issue so I've submitted a bug to https://bugzilla.kernel.org/show_bug.cgi?id=218928