Accented letters and numbers

I am using the Alphabetical Tag Cloud – Gutenberg Block on the page listed here. Although I have created groups for numbers (0-9), the entries are showing up as individual digits. You can see on that page a tab for “4” and another for “9.” The same thing is happening with “é.” I would like the numbers to be under a single tab and the é under the letter E. Is it possible to accomplish that and how?

Many thanks.
Egídio

The page I need help with: [log in to see the link]