Graph objects fig.data.y update does not work as expected for the gantt charts

Hi Nicolas,

I want to have multiple such tasks that would be say like 10 Gantt bars and using secondary y axis for every new task does not seem feasible…
Basically I would want to know can we edit the y axis for the Gantts in plotly to have the Gantt bars placed as the fixed y axis rather than the function choosing it for us,
I want to override the data.y fields of the Gantt chart so that the tasks are placed at a fixed position on y axis … It seemed like the data.y when I change it to like I tried above the data values change but the Gantt chart is not picking up those values, so I want to understand is why is not picking these overridden values when the other overridden values for the layout work perfectly as required…
Also I saw that this is possible with the bar charts in one of the posts. update data in bar charts
Something like this is what I tried to do but it does not reflect.
I hope my question is clear please let me know if I need to explain it in better way , I can re state the problem in a better way.
Also really appreciate your time in looking into this issue.
Thanks