My grandfather just past away and I don’t feel anything.

So as I just stated my grandfather passed away recently and I really don’t feel much. For context: my grandfather lives in a different country, I see him every year or so, he was a gangster back in the day so he was a really tough father and grandfather, and my dad raised me with super tough mentality to not show your feelings or emotions too much. I’ve never seen my dad even sad and when we heard the news I saw my dad cry for the first time. I kept thinking of all the memories of my grandpa but didn’t feel any overwhelming sadness. I’m not sure why. I feel like I’m emotionally broken. Is this normal?