In online matches I cant use kbm only keyboard is it just me?

In online matches I cant use kbm only keyboard is it just me? 

I've used kbm since i got the game on my computer and dont have any usable controllers (nintendo switch controller which dont seem to work correctly) but anyways is there anyway to use kbm in online matches or is it locked because of unfair advantage (ie: faster movements/ easier flickiing and turning/ easier time aiming shots)