Ubuntu 20.04 - Headset mic not working

[Devansh Soni]

I'm using Ubuntu 20.04 on an HP da0077tx laptop and my headset's mic is not
working. The same headset is working fine with other devices.

Audio Codec: Realtek ALC236

This Audio codec is not available on
https://www.kernel.org/doc/html/latest/sound/hd-audio/models.html

I have my interviews scheduled this week and this issue can create a
problem. Any help will be greatly appreciated.

Please let me know if you need any detail about the system.
Thank you
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