Intensity and regulation
Frustration, excitement, embarrassment or disappointment can sometimes feel disproportionately immediate. That does not mean the emotion is fake or that every strong emotional response is caused by ADHD.
Rejection sensitivity
You may see the phrase rejection sensitive dysphoria online. It describes a real experience reported by many people, but it is not a standalone diagnosis in major diagnostic systems. It is better treated as descriptive language than as a universal feature of ADHD.
Create recovery space
When emotion is high, reducing immediate demands can be more useful than insisting on instant resolution. Clear communication, time to process and returning to the issue once arousal has dropped can improve difficult conversations.