B650M HDV/M.2 Audio jack problem

apparently this problem is there on a lot of other motherboards from MSI, Asus, Gigabyte, Asrock as well due to Realtek + Nahimic. Some versions work and some don't.

no need to uninstall and reinstall all drivers. probably you can install audio drivers from your motherboard page and monitor drivers if there are any [since my monitor had]

install your monitor drivers then

goto Device Manager -> Sound, video and game controllers -> select High Definition Audio Device -> right click 'Update Driver' -> Select Browse my computer for driver software -> Let me pick from a list of available drivers on my computer -> check show compatible hardware -> select "AMD High Definition Audio Device -> Done and would ask for restart your windows. This worked for me my iGPU on 8600G processor and Monitor HDMI audio jack again started working fine without any issue.

for those who are problem with audio not working from Monitor's HDMI audio jack, could try installing "ATI HDMI Audio Device" R2.70 Drivers as well from realtek page https://www.realtek.com/Download/List?cate_id=593&menu_id=298

Glad to hear that the issue is resolved and your TV is back to working as a playback device!

Big thanks to @neolz for the helpful solution! It's always great to see the community working together to fix problems like this. Let us know if you run into any other issues or need further assistance!