I heard the claim that all HIV tests are exclusively based on identification via antibodies. Supposedly, no HIV test that's used on patients works via sequencing the RNA of the virus.
Do any AIDS test use RNA sequencing?
What's the criteria for existence?
The HIV-test is either described in detail in a academic paper by a group that used the test on multiple patients. The test finds HIV in the patients that should have HIV. It doesn't find HIV in patients that shouldn't.
Alternatively there could commercial vendor that sells the test.