Try to Save and Customize Report Title as “QA API Report” Instead of “Newman Dasboard Report”
It did not change the Report title to QA API Report
newman run ValidationRun.postman_collection.json -e QA.postman_environment.json -r htmlextra --reporter-htmlextra-browserTitle "QA API Report" htmlextra --reporter-htmlextra--export D://Api/Results/Api.html