Reasonable Faith have an excellent video regarding the Contingency Argument. This explains why God is necessary for the universe to exist without presupposing a beginning to the universe.
We live in an amazing universe.
Have you ever wondered why it exists?
Why does anything at all exists?
Gottfried Leibniz wrote, “The first question which should rightly be asked is: Why is there something rather than nothing?”
He came to the conclusion that the explanation is found in God.