There are various modes of LFOs in FLStudio as well as everywhere and they
are pretty generic and plain. There's no random type of LFO, I mean the one that shakes randomly.
Ain't no obsticle for a desire, though, 'cause Pole know how to do it, if he only wants. So, here's my solution: plug noise signal from 3xOSC to a channel, lowpass it with lowest cut off frequency and plug Peak Meter in a chain as well as X Y Controller behind it.
Noise getting through lowpass gonna turn into low frequency oscillation double-smoothed by inertia of meter and controller. Output of the controller (automation signal, not audio output) will be desired low frequency, random LFO signal.
Cheers and have a happy filtering!
Laffik