6 week old sleeping too long at night?

My 6 week old has been a great sleeper from the start and has slowly been increasing his nighttime sleep interval. However, tonight he was still sleeping at 7 hours! I got nervous, so I unswaddled him and he stayed sleeping. I was going to give him another hour to sleep, but then he started stirring and woke up to eat. He’s exclusively breastfed and will show hunger cues/fuss, but never really gets angry or cries super loud when he’s hungry, even after long stretches.

Is this too long?? What’s the longest he should go at this age?

He’s peeing/pooping fine and weight gain is slowish, but Pediatrician-approved. My first wasn’t sleeping longer than 4 hours by like 6 months old, so this is new territory to me.