[Maximo]

What are the ages of the two dogs?

I would let them sort things out between themselves. Intervene only when it looks dangerous. You can use verbal corrections more often, but use an even, authoritative voice. Don't do it angrily.

Make sure the first dog has a place to escape the second one and relax, especially if the second one is younger and more prone to puppy antics.

Try to set a schedule of activities: sleep time, meal times, play time that involves you, and training. When we added a second dog, having a routine and directing their attention to positive activities like training brought them together and calmed down the younger one. Training was very simple: performing sits, handshakes, down, etc for a single kibble.