Most amateur digital radios support independent IDs for each channel, such as the DM32, 878, 6900DMR, and UV4R.
The professional machine requires the ID to be associated with the machine and cannot be modified on the machine itself.
If that doesn't work, use two handheld radios, one for 46 and one for 86. Use the modified version of the box firmware to place both international and domestic channels on separate slots, and even listen to both simultaneously.🤣