Git Kraken just released a really cool way to visualize milestones, https://timelines.gitkraken.com/, and I think it would be a great way to show RRD progress.
Process
Export MS Planner as Excel Sheet
The school severely limits Planner API access so this is likely the best way to export planner for now.
Use PythonGlo Board Wrapper to transfer the Planner Excel export to Git Kraken Glo Boards