General developer forum

A few links that might be useful if you've not already seen them...

• Tracking progress docs: https://docs.moodle.org/38/en/Tracking_progress (I suspect the built-in reports described here should do what you want.)
  
• Custom report plugins:
  • https://moodle.org/plugins/block_configurable_reports
  • https://docs.moodle.org/38/en/Custom_SQL_queries_report
• Report plugin dev docs: https://docs.moodle.org/dev/Reports