How to disable co-author editing of abstracts in Dryfta?

Is there a way to turn off allowing co-authors to edit abstracts in the Dryfta platform?

Yes. To prevent co-authors from editing abstracts, go to Abstracts & Reviews > Submission Questions in the administrator dashboard, and unpublish the field labeled "Allow coauthor to edit." This disables editing privileges for co-authors on submissions they are part of.