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.
:(
You can just download the software to configure/manage it. It’s not the best situation but you don’t have to buy anything.
The DreamRouter 5G Max is the stand alone device.
Yeah, exactly how I feel! This is disappointing. I remember, and miss the days when UniFi wasn't as user hostile as they have become.
They literally list the standalone version further down the page:
* Dream Router 5G Max: The Fully Integrated UniFi Experience *