Thanks for the article.

The dotnet test CLI command can be used to generate code coverage reports in opencover and cobertura at the same time.

dotnet test '**/src/Tests/**/*.csproj' --configuration $(buildConfiguration) --logger trx /p:CollectCoverage=true /p:CoverletOutputFormat=\"cobertura,opencover\" /p:CoverletOutput=$(Build.SourcesDirectory)/TestResults/Coverage/

Above command generates 2 coverage report files

coverage.cobertura.xml

coverage.opencover.xml

This way, Step2 of converting the opencover to cobertura using reportgenerator tool can be skipped.