If poops is 18 months or less, you are out of luck w/o a LOT of time spent training him/her. I have 2 big labs and they both chew, but on approved things. It took the younger one a year and a half to stop chewing on nearly everything in the house. I had a queen sized very old beautiful ornate bed frame. The foot board had a spindle look to it. He chewed it (neary) completely up, one end to the other.
I think you are right. She is lonely and misses mom. Look at human babies, they put anything in their month and gum it. With no teeth they can’t chew things up and we never leave babies alone in a room except in their crib. Soon they know the crib means sleep. Same for dogs, after while my labs go into their respective crates to sleep. I haven’t even closd the doors in months.
Good luck