The H5N1 tests are PCR (with an extra “reversed” step for RNA) and are, in fact, pretty reliable. The same was true for COVID. The bad covid tests were the early antibody tests which had a ridiculously high false positive rate that made them useless. But the manufacturers lied about the quality or just relied on the lack of statistical literacy to sell their product.
It showed positive because The number of cycles in the PCR test was so high that it won't make any sense anymore. It was already positive from a slight contamination.
Please explain the difference between "positive" and "contaminated."
Your accusation that the tests are fake would mean what, that every test always tests positive?
I’ve taken at least a half dozen Covid tests and have never tested positive. That would seemingly kill your conspiracy theory.