i was in this italian film class and one time the professor brought in this filmmaker who showed us his film called “autumn beat”. main character has a stutter and while it’s not necessarily about stuttering it portrays it really well imo, i got to talk to the director afterwords (who doesn’t have a stutter) and asked him what inspired it, don’t rlly remember what he said think he had a family member or friend who stuttered. it’s not very well known but it should be on amazon