You could also check miRack, which is VCV Rack but obtimised for other platforms: https://github.com/miRackModular/Rack
Checkout this thread on how to make it work on Patchbox: Sunvox on Patchbox OS?
Unfortunately, miRack seems like it was abandoned. But I was able to play with it and install lots of extra modules. In my case, I was limited by the lack of good sequencer and quantizer, but if you find a module for that, let me know!