Hydroxychloroquine was/is suppressed for the same reason the more effective ivermectin is suppressed.
There can be no Emergency Use Authorization for experimental vaccines if there is any known alternative treatment.
From the CDC description of the requirements of the EUA law:
“3) the known and potential benefits of the medical product, when used to diagnose, prevent, or treat the disease or condition, outweigh the risks, both known and potential; and 4) no adequate, approved, alternative medical product is available“
https://wwwnc.cdc.gov/eid/article/13/7/pdfs/06-1188.pdfSo if the NIH or FDA were to acknowledge ANY acceptable treatment there would be no vaccine today. Two people in my household treat COVID patients on a daily basis and we have been successfully taking ivermectin prophylaxis dosage for about a year.