2 weeks sleeping in his own room by himself

Husband and I were upstairs cleaning up so I decided to rock baby to sleep, put him in his crib turn on the monitor so we could get some errands done.

Well baby passed out. Slept so well for about 40 minutes not swaddled which is unheard of. Usually he is really active and fussy and uncomfortable in both of his bassinets and he has to be swaddled. In his crib he literally just knocked out and is relaxed. We have the nanit and the nanit breathing band so we can monitor his breaths and movements and oxygen all those things so we know he's okay.

I know they recommend babies don't sleep like this until their 6 months .... and my heart is like wow he's only two weeks and already by himself. Should we keep putting him in our room to sleep or is it okay to put him by himself as long as he's monitored?