We have setup a Virtual Machine on Google Cloud to generate both the Matter SDK coverage report and the Matter SDK Conformance report.
We created a VM named matter-build-coverage. The machine configuration is located here. Reach out to Google team members if you need to make changes to this VM.
This virtual machine is scheduled to run daily, starting at 11:45PM and stopping at 2am. During boot, the machine runs the startup-script.sh.
The startup-script.sh script contains commands to checkout the SDK repository and create both the SDK coverage report and conformance report. The startup script uses scripts/build_coverage.sh to generate the coverage report and scripts/examples/conformance_report.py to generate the conformance report. The resulting HTML files are published via an App Engine service and available here (coverage report, conformance report).
If you make changes to startup-script.sh, make sure you go to the VM configuration, click edit and update the startup script in the Automation text box, to reflect your changes. The script in the Matter SDK repo is just a copy of the configuration in the VM.