Build-in-keyboards doesn't work once updating WIndows 11 22H2

Hi,

I just using Windows 11 on my LG Gram 17 2022 model, keyboards suddenly doesn't work after updating. I just wondering why.. but checking reddit or discussing with LG support,  it is 'recognized issue' on 22H2. 
https://www.reddit.com/r/WindowsHelp/comments/xr33s1/keyboard_not_working_after_win11_22h2_update/
I just wondering why it is happend on it, PS/2 driver will be removed/discontiued on the latest? how about the workarounds? Microsoft does NOT clarify such a issue, rathe