As far as I know there has never been a graphical network map, neither in the old Google Wifi app, nor the Google Home app. Do you mean the list of connected devices? If not, can you do a Google photos search for a screenshot, and paste into a reply to show what you mean?
Thanks for lending a hand, @olavrb. @Triumphnutter, I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.