those few months of freezer aren’t what are making the age gap. The age gap is inherent in the maturity of girls vs boys. The girls come back from seminary at age 18/19/20 ready to run a household and they want to date. The average boy at age 20 at best just wants to sit and learn and not worry about anything else.
I know many girls who are hesitant to go out with a 20 year old boy because they are probably not ready (and I’m not talking about girls older than that).
but yes, let the boy settle in, find a mashpia, because once he starts dating, he will need that