Faust can now be used in the VCV Prototype, see GitHub - VCVRack/VCV-Prototype and VCV-Prototype/Faust.md at v1 · VCVRack/VCV-Prototype · GitHub.
Some more info in the “Using Faust with VCV Rack” tutorial here: 2020-11-21 Faust & VCV Rack - Faust Documentation
Thanks Andrew for merging !