Of course, and the studies are numerous. If conducted in non-Chinese If conducted in non-Chinese contextscontexts the results are most of the time quite underwhelming or more reason for concern than anythinganything like "encouraging". Way too often the theory behind the treatments appears flaky, the evidence for effectiveness regarding desired results is weak and the dangers posed by unregulated and uncontrolled substancesdangers posed by unregulated and uncontrolled substances ingested looks quite big.
None. TCMTCM is very much incompatibleincompatible with Western tradition of scientific thinking and explanation. What has been found, occasionally, is that despite a – from a Western viewpoint – complete garbage perspective concerning the underlying theory, some treatments offered by TCM appear to be effective. But remember that effective and efficient might be two different things here.
If evidence based medicine oriented studies are undertaken, they analyse the effects of the herbsthe herbs and other methods according to Western scientific standards, "Qi" is not featured there.
Someone offering a diagnose and selling a treatment in the way described in the question is not only highly unethical but also quite unlikelyquite unlikely to be correct, even according to TCM standardsTCM standards.