Ah got it: MonoGame => Mono => .NET => C#
I using Mono on Linux still a necessity when using MonoGame or does it work with a recent .NET core as well? As Mono is basically a dying end since .NET core supports Linux natively. All Mono projects I know did or do migrate to .NET core, which serves much better performance compared to running things with the Mono runtime system.
I see OpenGL referenced, but not OpenGLES. The latter is supported on most ARM systems, the first not. However, if GPU hardware acceleration via OpenGLES really does not work, we can ship it with gl4es, an OpenGL API wrapper for OpenGLES.