Families with 3+ kids how’s it like?

Br

I have two kids and I wanted to expand my family with another little one (in the future) and my oldest loves his sibling but I’m afraid of his mental or emotional state feeling more left out and less loved. We always make sure to give him attention and love in the day time of course and we make sure that we do everything to keep them both happy fed and loved every day. But I know that having even more little ones can be hard sometimes to divide even greater attention between all kids.

How does your oldest react? How do you give them all the attention they deserve and more?