Is it possible to build Windows Images with Docker Hub Builds?

I created Builds for my images on Docker Hub but they failed with no matching manifest for linux/amd64 in the manifest list entries error.

My images are just pulling Windows Server Core 2019 image, installing .NET Core on it, and setting some Environment variables.

I searched a bit a came across this question from 3 years ago (How to build Windows image?) where Ryan Kennedy (@pkennedyr) mentioned that “Automated build support for Windows images is on our roadmap and will be addressed in 2017”.

Is it still not possible to build Windows Images or am I missing something?