Can i Cut Fanleafes

You can but you'll just reduce photosynthetic potential of entire plant as well as reduce CO2 intake, which is probably your biggest limiting factor. Leaves provide value beyond absorbing light. They are the "lungs," they are the storage facility. they add way more value than light that quickly spreads out the further away from the light it goes.. meaning any lower leaves that get some light are getting less of it than the leaves above. if you have a full canopy underneath them, that's less of a negative, but those bad boys pull in a lot of CO2 and you'd basically be throwing out a lot of fertilizer that the plant took in, processsed and stored in the leaft... a lot of wasted energy, imo... relative to 2 leaves, they are also a disproportionately larger chunk of leaf surface area at the moment. always have a good reason. don't do it out of habit. You can always remove a leaf... but there better be a good reason or it's a net-negative.