Lack of "effector" in Structure for jira cloud

[Daniel]

Hi, I'm still trying to fix this lack of effector on Jira cloud. 

In the gantt chart view I found that I can add a column with "Finish date" (dates defined at the gantt chart bars) in the tasks left window. Then I can export it to excel. In excel I have all the finish dates related to each of the tasks. 

I wondering if I can do a bulk change (export excel to csv and use as an input for the bulk change) in all of these tasks and look up due date with finish date at once. Is it possible?