What does 2 Samuel 12:8 mean?

'I gave you your master’s house and his wives. I put both Israel and Judah under your rule. And if that hadn’t been enough, I would have given you even more.' 2 Samuel 12:8 - Modern Text Bible

(God lists the blessings He’s given David—power, authority, and everything Saul had. God’s generosity is clear, and He says He would have given David even more if he’d asked.)