The brochure states: Passive PoE output on ports 2-5. Max current 1A per port.
For a 24V supply that means some 24W/port.
But your power supply must be able to supply the needed current, including the device’s own consumption of 6W.
Your default power adapter is able to deliver some 50W, so up to 10W/port should be a go. BTW. 6.5W is the maximum power consumption for the AP, usually it is less than that.
There should be no problem powering your APs.
I had an Unifi AP LR powered this way with no issues.