I have just one child. I thought it was kinda sad that they're an only child but I didn't think about that its more than that. They wont have any nieces or neph

I have just one child. I thought it was kinda sad that they're an only child but I didn't think about that its more than that. They wont have any nieces or nephews, if they have one child with a partner who is an only child my grandchild wont have any uncles, aunts or cousins either. Its a huge contrast to other branches in my family where there are like dozens and dozens of cousins all living close to each other and always hanging out.