I would like to make a rule that when an issue field is updated, then the custom field "Target end"

[Deleted user]

I am using jira version 8.20.10, I would like to make a rule that when an issue field is updated, then the custom field "Target end" of Advanced Roadmaps, is updated with the date of Issue Updated. Unfortunately when I try to map the operation I realized that from Automation for Jira (Project Automation as the customization item is called right now) it is not possible to call the Target end field to update it.