I have found a permanent workaround / fix to this problem.
Create a "custom" printer instead of using a pre-set from the list.
I have an Ender 6, so I initially used the Ender 5 pre-set, but ran into these problems as well.
I attempted to modify the .cfg files, but that did not work.
So I decided to create a new printer for testing purposes, and I chose "custom".
The Creality settings are no longer there, but you can always copy/create new settings that match those.
The settings available are:
Extra Fine - 0.06
Fine - 0.1
Normal - 0.15
Draft - 0.2
Extra Fast - 0.3
Coarse - 0.4
Extra Coarse - 0.6
I added / created Fast - 0.28 as that seems to produce very good quality prints for me.
Now new materials are available and "Not Supported" no longer displays.