Can 1 to can 2 trough usb2can?

in this situation is it possible to reach can 2 of adu and pmu trough can 1 usb2can?

No, you would have to connect USBtoCAN directly to the bus where you want to do something.

Since it looks like you don’t need different bus speeds, I would put everything on a single bus. There is no point in making it complicated if there are no benefits.

Move the devices from the secondary buses to CAN 1. There will be no need to move USBtoCAN around or pass through messages since every device will see all the data.

will do so, thank you