Not that this guy (Plaza Premium's VP of Business Development) is the absolute authority, but...
The Washington location is out of Plaza Premium's hands, as Capital One is working with another company on that lounge. But Vella promised Denver is opening soon.
“It will definitely be open in Q1 of 2023,” he said, meaning it should open by late March at the latest. A Capital One spokesperson declined to confirm that timeline.
“We are actively preparing for the openings of our Capital One Lounges at Denver International Airport (DEN) and Dulles International Airport (IAD) in 2023 and expect to share more details on both of these locations in the coming months,” the spokesperson said.
https://thriftytraveler.com/news/air...plaza-premium/