Additional Statistics: Mean expenses in a Sankey-Chart

I love this app and I used it the entire first half of the year creating lots of categories and keep adding all expenses.

In my opinion the most important feature is being able to analyze where my money goes. Therefore, I need something like an evaluation on the mean expenses in each category calculated using all (or better configurable) months. For this statistic, sankey diagrams are often used for visualization (e.g. Finanzfluss Copilot).
https://www.finanzfluss.de/rechner/flussdiagramm/

Here the category folders would also be illustrated nicely (which are mostly ignored in current statistics).

I'd be so happy if this would be considered in the future development cycles!