Newborn sleeps in different room, adult STTN. Will not entertain throughout to sleep train

yes there are issues... what if the newborn didnt cry out loud for milk? i encountered once (&once is enough), the pillow somehow flip to my bb mouth and there was muffled cries which thankfully i woke up to because we were in the same room and help her. it was freaking scary!!! what if blanket loosen up and bb move position and somehow couldnt cry loudly for help. please put newborn in the same room with you