Thanks for the question Macie. There's a couple of things you can check out before opening an Autopatch support case. If you see devices not up to date growing over time, navigate to Devices | Windows Updates. Then click Monitor and then click on Autopatch Devices. That report should show you total devices, ready devices and not ready devices. If your not ready devices is growing (or is bigger than you would expect) you should be able to see why they are in a not ready state. Usually devices that fall into this state will remain not up to date because they aren't ready to do so. 

The second thing to check is the Quality UPdate status report which has all of your devices and their status. Click on the Columns option and add in Client State, Client Substate, Hex Error code, Intune last check in time, Quality Update installed time, service state and service substate. See if the devices that aren't getting up to date aren't checking into Intune, aren't checking into the update service, or are in some sort of error state.

If these don't help you get to an answer, open an Autopatch support request to have one of our engineers assist.