Puppy Slept Through The Night But Free Roamed

This might get some hate but I have a 12 week old Newfoundland puppy. Overall she is very well behaved (Of course she has her land shark and zoomie moments) but she is know basic commands, sleeps in her play pen easily when we leave , and is 90% potty trained. We have had a couple of accidents over the last 3 weeks but not much.

Anyways, last night I took her out and fell asleep on the couch. The exhaustion finally hit me and I didn’t wake up again till 6:30. I freaked out immediately seeing the time but found my puppy sleeping right by the couch. Checked the puppy camera as it faces the couch and she went out by herself to potty through the doggy door (She learned to use it quickly as we have an older Newfoundland) at 3 AM then came and plopped herself right back near me.

Is she okay to roam at night as she now knows how to the doggy door? We block off our kitchen where the dog door is when we leave and I am thinking of using that set up at night for her.

Looking for suggestions as she still is young. Thank you!