The FAQ states the separate dongle is required, maybe it needs updating to include the newer models that have bluetooth integrated dont require the VE.Direct Bluetooth Smart dongle (ASS030536011)
Just confirming before I replace my controller with either the latest BlueSolar 75/15 or latest SmartSolar 100/20, as it seems counter-intuitive to then purchase a separate smart dongle
https://www.victronenergy.com/live/victronconnect:ve-smart-networking