You can use multicategory for both x and y-axis, however for y-axis you may have to change the orientation of the bars to be horizontal. See the use of orientation='h' in the below example:
import plotly.graph_objects as go
fig = go.Figure()
fig.add_trace(go.Bar(
x = [2, 3, 1, 5],
y = [['First', 'First', 'Second', 'Second'],
["A", "B", "A", "B"]],
name = "Adults",
orientation='h'
))
fig.add_trace(go.Bar(
x = [8, 3, 6, 5],
y = [['First', 'First', 'Second', 'Second'],
["A", "B", "A", "B"]],
name = "Children",
orientation='h'
))
fig.update_layout(title_text="Multi-category axis")
fig.show()
And if you’d like the bars to be stacked, set barmode='stack' in the update_layout:
