Each valid issue in a release should have exactly one of the following 2 labels: QA/Yes or QA/No. Unsurprisingly, you should use QA/Yes if you would like your issue to be QA'ed.
It means the issue will be tested once by QA on all platforms before it is released.
Fill out the Test Plan section in the issue's PR. Once the test plan has been specified, please add the label QA/Test-plan-specified to the issue.
QA is usually done on an issue when it reaches the Beta channel.
Send a DM to one of the QA team members to make it happen. They'll manually update some checklists that they maintain.