I'm sure a lot of those Lightning reservations are older than most ICE F150 orders. My Lightning reservation is from June 2021, my F150 ICE is from December 2021. I'll probably still get the ICE F150 before I get the EV F150.
I'm assuming it is geared more towards people with small children. Too many news stories of babies and young kids either being left in hot cars or busy parents forgetting them somewhere and driving away.