Your use of the word “jack” and addition of the tag jack may be confusing people. The tag jack is for JACK Audio Connection Kit whereas it appears that you are asking for help about a jack or phone connector (audio).
I’m not familiar with Realtek Audio Console, but your microphone input might become visible and selectable if you switch to the “Pro Audio” profile for your combo jack. This can be selected in both the Audio Volume widget in the system tray or in the Sound section of System Settings.
See this recent topic - Laptop doesn't recognize device connected to headphone jack