The church did not invent Jesus’ divinity. The church didn’t need to. Jesus was and is the embodiment of Israel’s God, and that fact is embedded firmly in the Third Gospel.
Critics have a field day with Christians’ claim of Jesus’ divinity in Luke’s Gospel. At first glance, it does seem that the critics are right.
Luke does indeed have an answer, but he refuses to serve us fast food. He takes his time and allows his plot to be seen slowly... So, be patient and yet confident.