I don’t know how the plugin structure and interfacing of MOD plugins works and if it’s similar to plain LV2, but I really like using your Carla patchbay plugin within Ardour, so something similar would be great.
Hypothetical workflow would be creating pedalboards on the MOD until I have the perfect sound, export them and use them inside Ardour/Reaper/… for producing songs while having the exact same sound (ignoring preamp/interface influence) on my MOD for playing on stage.
This would mean that all the plugins will have to be compiled for x86-64 oooor (long shot) somehow run on a qemu arm64 VM interfacing as a “virtual MOD” LV2/VST plugin with probably 10sec of latency
Compared to standalone app a DAW plugin would be much more flexible and still as useful, as long as it synchronizes with the MOD hardware; compare Line6 Helix for example (this doesn’t mean you’re supposed to copy them, but people do find their approach useful ;)).
Leave the Raspberry Pi support to the Pisound guys, unless you want to target even the tiny DIY-pro-linux-audio-on-ARM community.