`fitbounds="locations"` parameter not working for `px.choropleth_map`

The fitbounds parameter appear not to work when used in choropleth mapbox. The only way I found to pass it to the Figure object was to use the update_geos method.

The following is a sample of the code to show the parameter used:

fig = px.choropleth_mapbox(
        df, 
        geojson=self.geojson,
        featureidkey=self.featureidkey,
        locations="location_code,
        color=self.metric,
        mapbox_style="carto-positron",
        opacity=0.4
    )
fig.update_geos(fitbounds="locations")

When calling fig.show, the plot opens to the (0,0) location in Gulf of Guinea.

Why the fitbounds parameter doesn't work on choropleth mapbox?

Start by reproducing the provided px.choropleth_mapbox example and inspect how fitbounds is handled by choropleth_mapbox versus update_geos. Trace the figure-generation entry point and confirm the map centers on the supplied locations instead of (0,0); document a focused regression check for that behavior.