[FGSD-1022P] Could FGSD-1022P supports 8 PoE power class 3 devices (PoE power class 3 range is from 6.49 Watts to 12.95 Watts)?

Yes, FGSD-1022P could support 8 PoE power class 3 devices, because FGSD-1022P provides full PoE power up to 180 Watts maximum totally and could provides completely 15.4 Watts power on every single PoE port, also FGSD-1022P supports PoE power classifies detection and will reserve enough PoE power for your PoE device automatically.