Plotly Treemap question for font alignment of parent container

Hi.
Need help to custom treemap.
How to align horizontal center for the parent container?

import plotly.express as px

_all_box_name : list = ['parent0', 'parent1<br>asdflkassadfsadfsadf', 'item0<br>100', 'item1<br>123']
_sector : list = ['', '', 'parent0', 'parent1<br>asdflkassadfsadfsadf']
_volume : list = [0, 0, 332, 532]
_labels : list = {'parent0' : 'parent0', 'parent1<br>asdflkassadfsadfsadf' : 'parent1', 'item0' : 'item0 111', 'item1' : 'item1222'}

fig = px.treemap(
	parents = _sector,
	names = _all_box_name,
	values = _volume,
	width = 1024,
	height = 768,
	labels = _labels
)

fig.update_traces(    

	textposition="middle center", 
	textfont_size=33
)
fig.update_layout(uniformtext_minsize=8, uniformtext_mode='hide')

fig.layout.hovermode = False
fig.data[0].texttemplate = "<b>%{label}</b>"
fig.show()