>>janand+(OP)
FAQ: "Can the UniFi 5G Max Outdoor work as a standalone device?"
-> No. The UniFi 5G Max Outdoor must be adopted by a UniFi Cloud Gateway or UniFi Gateway and cannot function independently as a router or modem.
>>kllrno+ai1
Why do you need the entire integrated setup to be outdoor-rated? That just adds tons of cost. If the antennas and modem need to be outside for signal strength reasons, so be it, but as much of your networking gear as possible should be indoors.