Second 'x axis' for horizontal bar chart subplot

I would like to add the second ‘x’ axis (line, ticks and title) to a subplot horizontal bar chart to have the same axis on both sides. However, when I use a bar chart with horizontal orientation, I cannot use ‘secondary_x’.
Is there any trick to apply here? Thanks.

import plotly.graph_objects as go
from plotly.subplots import make_subplots

fig = make_subplots(
       rows=3, cols=3,
       subplot_titles=('','Vertical plots','','','','','','','') ,
       print_grid=True,    # layout tuning
            [{}, {},{}],
            [{}, {"secondary_y": True},{}],    ## no secondary_x feature
            [{}, {},{}],
bars = [1,2,3,4,5,6,7,8]

fig_bars = go.Bar(y=bars, x=bars, orientation='h', text=bars)
fig.add_trace(fig_bars, row=2, col=2)

fig.update_yaxes(tick0=0, dtick=1, showline=True, linewidth=1, linecolor='#696969', ticks="outside", tickwidth=0.5, tickcolor='#696969', range=[0,10], ticklen=2, row=2, col=2)
fig.update_xaxes(title='Size (mm)', gridcolor='white', range=[0,11], ticks="outside", showline=True, linewidth=1, linecolor='#696969', row=2, col=2)
fig.update_layout(height=600, width=200, paper_bgcolor='rgba(0,0,0,0.0)', plot_bgcolor='rgba(248,248,248,0.9)', margin=dict(l=20, r=20, t=20, b=20))

HI @ondrej.kuda welcome to the forums.

I’m not sure I understand what you are asking. Unfortunately the MRE (thnaks for that) does not help. How do you want your chart to look like?

I would like to have the identical secondary x axis (top and bottom). Within the same graph (see the image below).
My workaround is to plot the second axis in the top center subplot section (row 1, col 2) and align it properly. However, I want to use also the other sectors for other plots.

By the looks of it, this might be helpful to achieve this (I did not read in detail):