Hey Aristos, quite a while back there was a discussion about adding additional tourism info to the EDR. The additional code was pasted here https://pastebin.com/n2ZiRB0S
It basically adds the following information below the Tourism Per Turn info already there:
Domestic Tourists:
Total Visiting Tourists:
Foreign Tourists To:
Foreign Tourists From:
Tourism Tooltip Info (such as trade routes, open borders etc that provide increase tourism bonuses) - this is to keep an eye on turn based bonuses that need renewing
If you're worried about consuming too much screen real estate, you could have a window tooltip that pops up by hovering over the tourism icon on the primary EDR window.
Let me know your thoughts or if you need more info. It would be fantastic to have this included and would make it soooo much easier to track progress towards a culture victory!