Solomon was a type of the Son of God who is King of God's people.
Begotten simply means natural son.
In 2Sa 2:5, 13-14, for the King to declare someone his "son" meant he was naming that person as a subject king over his people under the authority of himself.
That is Paul's meaning in Ac 13:33.
Jesus was declared with power to be the Son of God (King over the Father's people under the Father's authority) by
the resurrection.
Begotten simply means natural son.
In 2Sa 2:5, 13-14, for the King to declare someone his "son" meant he was naming that person as a subject king over his people under the authority of himself.
That is Paul's meaning in Ac 13:33.
Jesus was declared with power to be the Son of God (King over the Father's people under the Father's authority) by
the resurrection.