In the latest versions of Canary, there is a bug with the fonts (Appearance / Customize Fonts)
Fonts can not be changed
Yes, to provide more info about this issue which is on Edge insider Version 80.0.360.0 (Official build) canary (64-bit)
selecting any of the fonts from the list won't change anything and it reverts back to the default Times new Roman again.
Yes it's good :)