Vincent and Pablo that is AMAZING!
This code in the page code (Project settings > Custom Code > Head code)
<link href="https://fonts.googleapis.com/icon?family=Material+Icons"
rel="stylesheet">
then the word for the material icon, for example “search” “delete” or “face” (find them here: Material Symbols and Icons - Google Fonts)
and the Style “material-icons” in the Selector
It works perfectly, and you can change the style color by adding a sub class. Other styling changes work too, for example size.