Can I make grouped bars in plotly polar bar chart?

Question

I have a polar bar chart with stacked bars in plotly, which gives me the figure below using the code I've added as well (example found here: Wind Rode Charts):

import plotly.io as pio
pio.renderers.default = 'svg'
#pio.renderers.default = 'browser'

import pandas as pd
import plotly.express as px
import plotly.graph_objects as go

df = px.data.wind()

fig = px.bar_polar(df, r="frequency", theta="direction",
                    color="strength", template="ggplot2",
                    color_discrete_sequence= px.colors.sequential.Plasma_r)
fig.show()


fig.update_layout(legend=dict(
    orientation="h",
    yanchor="top",
    y=-0.2,
    xanchor="center",
    x=0.5),
    polar=dict(radialaxis=dict(showticklabels=True, ticks='', dtick=1, linewidth=0)
    )
)

fig.update_polars(angularaxis_dtick=1, 
                  angularaxis_exponentformat="power")

fig.show()

Now, I would like to group some bars together, similar to the figure below (examples python graph gallery):

I cannot figure out how to do this with plotly so I keep both the stacked bars AND the grouping. Any hint or suggestions would be highly appreciated.

Thanks!