Can we add support for multiple add-on interfaces to the esp32 hardware? I'd like to build some hardware (or not even need to build hardware by using GPIO pins) to have 3 CAN interfaces as "required" by some complicated setups like SMA + double battery.

Ideally we'd add the ability to add at least 3 opto-isolated MCP2518FD CAN FD/non-FD interfaces and track whether they're CAN-FD or not.