Tyler has you covered, but I’ll offer another avenue to pursue. I’ve used a MIDI Baby 3 with the Rose, but always with a laptop (dedicated as a studio hub) in between. Reason being, I am forever changing MB3 configurations with the online Editor, and swapping it among devices with no DIN.
I can tell you from experience that Disaster Area has great customer service & support. They stuck with a problematic issue I had until it was resolved, at no cost.
I’ve never used their companion gHOST Adapter, but you might want to contact them with questions regarding compatibility with the Rose.
Awesome pedal, BTW. Nothing else sounds quite like it. Too bad it took so long for people to catch on.