Is UAVCAN and DroneCAN compatible with CANBUS?

I have a logger that uses CANBUS communication but the sensors communicate via DroneCAN and UAVCAN.

Can I make this connection and have the CANBUS protocol be able to interpret the data, i.e. decode it?

No, you cann’t. you need DroneCAN Adapter.

Would a DroneCAN adapter also allow the use of standard CAN devices on a DroneCAN network? (ie. controlling/reading a Classical CAN 2.0 servo using DroneCAN)

This requires the use of DroneCAN CAN Converter