https://qagg.news/?read=3234 "Find the reflection inside the castle" Pics of Biden "OO" from Google Image search "biden oval office":
usatoday: https://www.gannett-cdn.com/presto/2021/01/21/USAT/302c24f4-ee23-4eb0-977a-60c82a33b3c1-Biden_Oval_Office_Decorations_01.JPG?width=2560 realtor.com: https://rdcnewscdn.realtor.com/wp-content/uploads/2021/01/joe-biden-JIM-WATSON-Contributor-1.jpg
...and others. Clearly, the strong rectangular light reflections on the windows aren't from street lights, but match studio lights from a film set. For some reflections and angles you can make out the black parallelogram around it, which matches the casing of a studio light.
Edit: obvious in this one https://thehill.com/sites/default/files/bidenovaloffice_01202021.jpg zoom in for the black rectangles above the rectangular light reflections in the right window
There are images here where you can cleary see the lighting is not continuous around the tray ceiling. The same reflection can be seen in OPs sauce. The other sqaure light reflected in windows are standard video lighting more than likly brought in by camera crews.
http://www.whitehousemuseum.org/west-wing/oval-office-history.htm