For some Moodle forums, Moodle can differentiate between the initial post and the rely to a post (reference: https://moodle.org/mod/forum/discuss.php?d=388500). When it comes to grading, there are instances where teachers may only want to grade a student's initial post and not their replies to other posts.
When teachers use the dashboard or GradeMe block to grade forum posts, currently ALL posts get flagged for grading. Having the ability to only flag the initial posts for grading will allow teachers to utilize the forum's built in grading system in of using the work around having students copy and paste their initial post into an assignment submission.
The copy and paste has worked for my school for the past decade by now that we're reaching 2020, it's time for me to find a way to let the LMS do this work and not the student. I don't have any code to contribute at the moment. I will post this tracker in the forums for feedback.