>>63942423it was a combination of underestimating how many panthers the enemy had and the Vth corp having already been trained on the 75mm gun and a desire not to have them go into battle with vehicles they had only just received
so even though they were available for use, no one actually requested them
they offered them to the british, who also didnt want them because they already had the sherman firefly
panthers did end up being more common than anticipated, but the first panzer brigade to attack the US beachhead was annhilated before it saw a single US tank after 16in naval gunfire dispersed them
so the 76mm shermans werent issued until the breakout from beaches, where they would have expected more tank combat when maneuvering out to entrap the germans