He's also biased against players from "smaller teams". You rarely see more than 3 or 4 players being picked from smaller teams. The moment Upamecano starts playing for Bayern he'll get picked in the squad.
Upamecano is injured and Laporte will probably never be called up by Deschamps again. Kounde could've gotten a chance though. But he's also had a dip in form and Deschamps prefers the players he knows, hence Lenglet.