RoadMapMaker
The automated RoadMapMaker is a google javascript created in google Sheets and MS365 online version of Excel.-
The spreadsheet is intelligent so you can automatically draw Gantt charts from a list. I've used this many times for large SAP international SAP projects for displaying real-time status of all testing streams.
Enter a start date and duration and the Roadmap is automatically created.
All the code is open source and available on GitHub here ->
Further development for integration with GitHub is ongoing. See https://docs.github.com/en/rest/guides