Some are very good at keeping any mental health issues extremely close to themselves, especially males. Was a male member of my family, late 20s who was having a breakdown behind the scenes, his partner had no idea, employer no idea, nobody else had any idea, we had a day with them only a week prior, I picked up nothing at all.
The moment we all found out was when he didn’t return home from work one day, he left work and checked himself into ER. A few years later now he has turned his life around, well we assume he has.