Measuring Device Usage and Screen Time

Screen time has become a hot topic in education, and so we are getting requests from our administration to measure how long a student spends on their school-issued iPad each day, optimally broken down by the minute. Systems Manager currently measures connectivity, but not usage, to my knowledge. Unfortunately all effective third-party applications for measuring screen time are installed as device management software, and so are unusable in conjunction with Meraki (Apple will not allow more than one management software at a time). We are also not running a Meraki switch and access point environment, so it would be a huge help if this feature were available simply through Systems Manager, please. Thank you for your consideration!