Even when I went into the service they wanted us initially to do bayonet training right-handed. There were some guys that really struggled so they relented and allowed both. Since I could go either way and the Sergeants loved keeping us holding the 9.2 lb. rifle out in the tiring thrust position, I alternated.
Funny story, back when I was in junior high there was a thing called the California Cadet Corps and believe it or not we fired .22’s into bullet traps on the tennis court. They tried to make me fire right handed, even brought me over to the target to show me how well I did hitting the small sighting target. That all ended when I told the officer I had been aiming at the large center bullseye, they let me shoot left handed after that.