In real life, the hover check has nothing to do with ATC. It is simply a quick check of Ts and Ps, power available and general status prior to carrying out the take-off profile.
I have flown helicopters for over 20years with about 7000hs on different types, from military, to offshore and now air ambulance - and its pretty much the same routine for all types. Its basically your last “idiot check” before throwing yourself into the air!