BrainModular

Is there a possibility to communicate via a module with the bypass from the rack mode/all mode in order to get and to send its state ?

you can use this method :
create a new patch in your rack and create this :

( message is set to control change )
make a midi learn on your bypass with this ...?

you can also try a switch on a "patch active " module..?

just for info, will be able in the V5.