Unable to find CAN_D1_UC_BM

Hi!

I’m trying to get a set of KDE ESCs that were recently updated to enable DroneCAN working on my Arducopter 4.3.7 setup. I think I’m supposed to set CAN_D1_UC_BM to the appropriate bitmask to enable throttle control, but am having trouble seeing the parameter. I’ve set the following:

CAN_D1_PROTOCOL = 1
CAN P1_DRIVER = 1

and left most other relevant parameters as default. Would appreciate any help understanding why I’m not able to access that parameter and how I might enable it.