I can not answer why this particular section is limited to the fields that can be changed. However there is an existing feature request to improve the number of fields that could be changed here. Please see JSDSERVER-4258 for details.
Since we do not have an estimate of if or when that feature request might be addressed, if this functionality is something you are looking for, you might have more success with a 3rd party plugin like Automation Lite for Jira or the similarly named Automation Tools for Jira.
I hope this helps.
Atlassian Summit is an excellent opportunity for in-person support, training, and networking.Learn more
...be more productive while being fun to use at the same time. For some, getting started can be a bit intimidating. This is especially true if Jira Service Desk is your first exposure to Atlassian...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs