I have created different groups for my class to easily extend due dates to students with extended time. While testing how grades would be displayed on my school's gradebook (Focus) I created an assignment, created different due dates using the aforementioned groups, and attempted to sync the grades. I am unable to post grades as I'm getting a message stating "Assignments without due dates or duplicate assignments cannot be synced". The groups are displayed:

I have verified that there are no duplicate assignments, and there is a due date (multiple, techinically). I removed the groups and assigned the assignment to "everyone" which allowed me to post grades. I have seen guides from Canvas recommending the use of groups to assign content to students with accomodations such as extra time, so I imagine this has to be something that can be done (Canvas guide on doing just that. Note it says nothing about syncing grades). I've also assigned tests to students in the past and had to add a student to a separate assignment to extend the time available without issue. Below you can see the assignment details.

Below you can see the message I am getting when I try to sync my gradebook. Again, if I switch the assignment so that it is assigned to "everyone", I can post grades just fine.

Does anyone have any suggestions or advice to fix this issue? I've included screenshots of my groups, the assignment details, and the grade sync message. Thank you in advance!