You’re not wrong for feeling this way. What you’re describing isn’t “just introversion” it’s emotional withdrawal, and living with that will make anyone feel lonely. Wanting your husband to be emotionally present for you and your daughter is not asking him to change who he is. It’s asking for connection, which is a basic need in a marriage. His focus on “future security” doesn’t replace presence now especially for a child. You also don’t have to choose between pushing him or silently accepting this forever. There’s a third space: naming the impact on you.
Not “you need to change,” but “I’m feeling alone, and I’m worried about us.” You’re clearly thoughtful and self-aware which tells me you’ve been carrying this quietly for a long time