CAN transceiver interface with two CAN BUSES
No, this circuit doesn't make any sense. You simply can't &quot;mux&quot; two different CAN buses to the same CAN controller, for a long list of reasons. You must use 2 separate CAN controllers.
The only case where such a connection will make sense is if the MCU only ever speaks to a single bus and never the other, as part of some hardware/software setting etc.
Start by studying how CAN, bus arbitration and message ACK work.