Found this while I was researching all of the GEE errors. It replaces the marker we have now with an exclamation point inside a red triangle. I have this in my making_dry notebook.
In the section titled, "Folium Map of All Verified Landslide Locations"
for index, location_info in landslide_gdf.iterrows(): folium.Marker([location_info["lat"], location_info["lon"]], popup=location_info["type"], icon=folium.Icon(color='red', prefix='fa', icon='exclamation-triangle')).add_to(mp)
Note the above is not keeping the correct indentation