How to split the y axis on a combo graph?

How to split the y axis on a combo graph?

I have a stacked combo graph where the 2 bar graph items are sums and the line is a percentage (count % of total). The line is showing really low, because it's comparing the percentage to the count.

Is this currently possible? According to the post in this topic it is: https://help.zoho.com/portal/en/community/topic/split-axis-combo-chart