(I'm using a MacBook Pro (16-inch, 2019) Monterey v12.5)
I was trying to test different font settings and I came up messing my "Fixed-width font".
The default is "Custom" and once I changed it to other fonts it just disappears in the drop-down list. I figured out "Custom" font should be Courier New with bold font weight.
I have been googling to see if there is any way to restore it to the default but not quite getting the answer.
Reinstalling Chrome might be one of the methods but it takes me long time to restore other settings. I would like to know if there is other way before trying reinstall.
I just found the way to solve my own problem.
What I've done is:
The original font should come back. Hope this help someone who has the same problem as mine.