Using WFS download service or WMS feed in Folium, a python library

Question

Please advise how to leverage GetCapabilities to add a legend to a layer in folium.

The WMS service has the following capabilities: https://data.geopf.fr/wms-v/ows?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetCapabilities

source: https://www.geoportail-urbanisme.gouv.fr/services/

I am adding a layer as follows (but I don't know how to add a legend):

m = folium.Map(tiles='CartoDBPositron', location=(52.052515, 10.025593), zoom_start=4, )
folium.raster_layers.WmsTileLayer(
    url='https://data.geopf.fr/wms-v/ows?',
    name='zone_secteur',
    fmt="image/png",
    layers="zone_secteur",
    attr=u"Institut national de l'information géographique et forestière",
    overlay=True,
    transparent=True,
    control=True,
    show=False,
).add_to(m)

I expected to see urban zones (zone_secteur or zone_urba_du) from one of the layers from this map: https://www.geoportail-urbanisme.gouv.fr

Please advise how to add a layer-legend in folium using this URL:

GetCapabilities shows this URL

<LegendURL width="20" height="20">
<Format>image/png</Format>
<OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="https://data.geopf.fr/wms-v/ows?service=WMS&version=1.3.0&request=GetLegendGraphic&format=image%2Fpng&width=20&height=20&layer=BU.Building"/>
</LegendURL>