do I need a muzzle?

hello everyone! I had an issue today in my rental apartment. we were coming inside when a smaller woman saw him, screamed and ran away. he barked as this put him on edge and went into protect mode. he is 10 years old and has never bit, barked, or lunged at a person before. he was standing still while barking, and did not lunge. this was a one off issue. he does growl at mid size dogs (retriever, shepherd, etc) because he was attacked as a puppy and carries that trauma with him. after he barked at the woman today, another woman opened her door and yelled at me that I have to muzzle my dog. do you think he needs a muzzle? if so, here are his measurements.

he is a cane corse-mastiff-st. bernard mix. he weighs in at a whopping 190lbs (but of course is a lap dog). his snout is ~17”, neck is ~26” and nose to head is ~11.5”. i’ve attached a photo of his big head because he’s just too cute! anyways, I’m having trouble finding a muzzle in his size that is good quality, does anyone have any recommendations? would a head holster be a better option? I’m just not sure what to do in this situation, but someone recommended coming here for muzzle advice. thank you for your time and help!

hello everyone! I had an issue today in my rental apartment. we were coming inside when a smaller woman saw him, screamed and ran away. he barked as this put him on edge and went into protect mode. he is 10 years old and has never bit, barked, or lunged at a person before. he was standing still while barking, and did not lunge. this was a one off issue. he does growl at mid size dogs (retriever, shepherd, etc) because he was attacked as a puppy and carries that trauma with him. after he barked at the woman today, another woman opened her door and yelled at me that I have to muzzle my dog. do you think he needs a muzzle? if so, here are his measurements.

he is a cane corse-mastiff-st. bernard mix. he weighs in at a whopping 190lbs (but of course is a lap dog). his snout is ~17”, neck is ~26” and nose to head is ~11.5”. i’ve attached a photo of his big head because he’s just too cute! anyways, I’m having trouble finding a muzzle in his size that is good quality, does anyone have any recommendations? would a head holster be a better option? I’m just not sure what to do in this situation, but someone recommended coming here for muzzle advice. thank you for your time and help!