Found the episode in question after doing some digging - S1E10 Blood Money
West lobby, elevators on the right
Exterior glass entry pavilion
You can find the series on Tubi for free - the shot taken in the lobby is around 12:55 in
https://archives.yale.edu/repositories/5/archival_objects/3476719 More shots of the Pru throughout its history - buggy website however, so be wary of the frequent 403 Forbidden error
Those old retail design showcase books from the 80s to 90s always have a fair share of old, forgotten photos. I’ve seen that some of them have some old shots from Copley and Prudential
The Berkshire Grill only took up the size of the highlighted space. I think the mall map just shows general areas for “anchor” restaurants and services.