How to change the spacing value when offset: true is applied

[mrleblanc101]

So I have this Line chart with a stacked Axis, the top axis has offset: true which create this gap between the 2 axis.
Works fine.

But in this stacked Bar chart, the offset is very small, I would like to increase the value of the spacing between the 2 axis:

[mrleblanc101]

Reopened as Q&A