DJM REC APP Don't rec FXs & mic

Hi! I am using DJM-900 nxs2 and iPhone 8+ with original lighting cable. When I am recording from the mixer with DJM REC app, it is recording ONLY the channel faders & EQ-s + filter & trim. The internal FXs (reverb, echo, ping pong, spiral, etc...) from the mixer and the microphone are not recording. Any suggestions about this issue?