Has anybody had a sibling who died by suicide?

Wondering, and wanting to maybe speak to anybody who’s sibling took their life due to the lasting effects of their narcissist parents abuse… Bonus points if you match my situation, oldest/older sister, sibling was a brother, narcissist was a father. my brother was more than just a brother to me like he was everything, he was my best friend, my sidekick, and many more things. Losing him feels like I have lost everything. My other brother has classic autism, so I’ve essentially become an only child, and my mother is so grief stricken… everything has changed and I’m not coping with the realities.

I just feel my situation is so unique and I can’t talk to anybody on a soul level because nobody understands unless they experienced a real narcissist.