Not a peep from anyone in government or the party about stuff maybe taken from the White House.... not 100% confirmed but certainly there are people still working there who can confirm if something is missing....
I expect he could issue an executive order. But I think he'd want to appear hands-off. I'd guess he'd have LE handle it. They'd probably want to investigate (interview staff/aids, then family if needed) first. Trump and family/friends are clowns, but can't see it dragging on.
Or maybe nothing was taken? Lets first get a list and then enforce law. That pesky evidence clause. If they took stuff from the White house that wasn't theirs, I'll be at the head of the line calling for law enforcement.
Not as ultimate as Trump. If he has half stripped the place for his clubs, Biden should have him and anyone receiving stolen goods arrested for it. Theft is easily proven. In my grand aunt and grand mother's house were many small items presented to their cousin who worked in the White House over 20 years. These were all kept with letters showing their provenance as gifted for service or sale dockets for items purchased (some plates etc. as seconds) from suppliers. Every care and caution to ensure nobody could accuse of theft because of the shame of it. Now Donny is reinacting that episode of the Simpsons where the carnies move into the family house and they can't get rid of them...