Configure fields of subtasks while calling issue api

I am fetching an issue using this endpoint: /rest/api/3/issue/<issue_key>?fields=summary&fields=subtasks&fields=parent&fields=issuelinks&fields=status&fields=resolution&fields=issuetype&fields=priority&fields=assignee

I want additional fields like resolution, assignee along with the default fields. this information is fetched for the parent, but not for the subtasks, related issues.
Is there anyway in which i can get the information without making a call for each related issue?