@feWIN welcome to the KNIME forum. Sometimes the KNIME nodes might lack some flexibility when customising graphics. One way to deal with this is using the built in Python environment and let ChatGPT create a suitable code that you can then access via a nice KNIME component and customise it easily.
In this case I have added the option to sort the Box/Violin Plots either by name or by count like you would want this to be. You can add titles and footnotes and also export the whole thing as a PNG file. Changes are easy to make with the help of a LLM model.
Also in this case the statistics will be exported as a data table for further use.
With KNIME it is easy to build quite sophisticated graphics that are then easy to use by yourself or share with others.
You might get inspirations from more examples on the KNIME Hub