Separation anxiety?

Since Covid started neither of my two dogs have been left alone at all since I have three roommates and usually one of us is home at all times of the day. Lately since everything is opening back up around us, we have started making group ventures out of the house leaving the dogs behind. Each time we all have left for an hour or two something gets chewed up/destroyed and all signs points to the puppy. Phoebe is about nine months old now and has never been a destructive dog but loves to chew on bones. Whenever we leave we always leave bones, they have the toy box as well, and insure the house is dog friendly. Thankfully so far it’s been nothing expensive and nothing harmful for her, just a cardboard box, papers, and a wooden coaster on our table. Our older dogs have always been allowed to free roam through our house while we are away or if the weather is really nice, out in our fenced in backyard, so I have never had this issue before. I’m not quite sure if this was caused due to quarantine or if this was a behavioral problem before that just was never seen since she was in a crate as a young puppy when we were gone. If it all possible I would like not to put the crate back up as my other dog does not stay in one during the day and we barely survived the nights of crate training as it was. I thought I’d ask around on this lovely platform for some ideas. I’d also like to point out the fact that she doesn’t act stressed out when I leave or a few of us leave it’s only when we are all gone. We would all be thankful for any advice you can offer!