Am I feeding long enough?

My newborn is almost 2weeks. He only feeds for 10 min. Sometimes he can go for another 10 min on the other side after I burp him but most of the time he doesn’t want to continue. He fills a diaper almost every hour and poops a decent amount as well. Also my letdown is a stream so I catch about 2.5-4oz each feed(during the day) with the haakaa on the other breast during each feed. He’s gaining weight and the pediatrician said it’s fine because he might be just sucking it all out quicker.