I’m not a team member, but maintaining a version outside of the MOD hardware ecosystem would be a major drain on the limited resources they have available. I think most device owners like myself would much rather that time/effort/money be put to use on the official platform itself.
That said, MODEP does what you’re asking for already. It’s module of Patchbox OS, which is a PI-compatible MOD Duo “emulator” that lets you save and load pedalboards like you would with a MOD device.
It hasn’t been updated in a few years, so it’s similar to what the Duo was like as of 2020, and it doesn’t have some of the major new plugins.
I used this on my rPi 3b (with a Scarlett 2i2 interface) to test out the platform before getting my Dwarf.
It is a great way to test the waters - Just keep in mind a real device is newer, more feature-rich, less buggy, and has far less latency.
I’m unfamiliar with the Zynthian implementation of the MOD-UI, so this info may be redundant, but I hope it helps regardless.