Converting AI/Affinity/Procreate brushes into Corel Artistic media brushes?

Question #1

Why the heck are there no commercial Corel artistic media brushes out there?  I know that you can make your own, but I can't be the only one who would happily pay for aftermarket brushes, and it seems bizarre that I can't find any.   Is there a secret handshake I have to know to find them or something?

Question #2

I started with C6 and I know there used to be workarounds to use Adobe brushes, but I haven't tried to do it for years; is there still a way to convert
AI, Affinity or even Procreate brushes to Corel 21?   (Standalone/perpetual license Windows version if it matters.)