grocy, mealie and firefly3 integration

I will be starting a self hosted setup soon. part of it will be a mealie-grocy-firefly3 stack.

Its my understanding that i can set it up to do this...

A. import recipes into mealie. this i do myself

B. i want it to automatically import ingredients from mealie, and if they are not in grocy i want it to add them into grocy

C. once that is up and running i want to integrate all into firefly3

what is the easiest way to interrogate all 3 in that order?