Why tickvals/ticktext is not showing on x-axis in population pyramid graph

Creating instance of the figure

fig = gp.Figure()

Adding Male data to the figure

fig.add_trace(gp.Bar(y= y_age, x = x_M,
name = 'Male', orientation = 'h'))

Adding Female data to the figure

fig.add_trace(gp.Bar(y = y_age, x = x_F,
name = 'Female', orientation = 'h'))

Updating the layout for our graph

fig.update_layout(title = 'Population Pyramid of Registration Data',
title_font_size = 22, barmode = 'relative',
bargap = 0.6, bargroupgap = 0,
xaxis = dict(tickvals = [-1000, -800, -600, -400, -200, 0, 200, 400, 600, 800, 1000],

						                 ticktext = ['10H', '8H',  '6H', '4H', '2H', 
                                        '0', '2H', '4H', '6H', '8H', '10H'],
							
						                 title = 'Population in Hundreds',
						                 title_font_size = 12)
		       	   )

fig.show()

PP graph.docx

Reproduce the issue with the supplied R population-pyramid example, especially the xaxis tickvals and ticktext settings, and inspect the behavior around fig.show(). Confirm whether the configured labels appear on the x-axis; done means the example renders the requested tick labels correctly or documents the limitation and its cause.