Not easily accessible since you know, Lichess and not tracking users 😅 would be interesting though for sure.

Python, it's linked in my other comment.

I got some great feedback from my previous post and so updated the visual to make it easier to interpret. The black line is a standard day and green is each day of the world cup so far. Full code is here https://github.com/michael1241/wclichess including the data used to generate it.