Ultra Instinct Goku vs Beerus AFTER Moro
Yes, Goku can beat Beerus. In the Tournament of Power, Goku, with the complete UI, defeated Jiren, who was the mortal more powerful than a god of destruction. Jiren was stronger / more powerful than Beerus, and then, when Goku overcomes Jiren, he ends up overtaking Beerus.