Good day.
There is no WCS builds for ARM architecture. WCS uses a lot of native code to transcode audio and video, so it is bound to x86_64. In its turn, Docker is not a full-fleged virtual machine, so it cannot virtualize hardware, just uses the platform on which it is running.
The final answer is no, there is no plans to release a build or Docker image for architectures different from x86_64.