It looks like maybe they do.
On April 18 of 2020, the U.S. Food and Drug Administration issued an Emergency Use Authorization (EUA) for non-surgical face masks to be worn by the general public. It was updated on April 24, 2020. You can read that EUA here.
The law that governs the granting of EUAs is the "Federal Food, Drug and Cosmetic Act." You can see the relevant portions of that law here.
This law specifically states that "...individuals to whom the product (in this case, non-surgical face masks) is administered are informed... of the option to accept or refuse administration of the product."
The law also states that individuals to whom the products are administered be informed "...of the significant known and potential benefits and risks of such use..."
In case you missed it when various governors, city governments, airports, the CDC, TSA, FAA, et al. informed you of these risks while demanding that you wear a mask on your face, here is some information about some of the risks (including the promotion of "pre-metastatic niches") of wearing face masks for a prolonged period of time.
The FDA's own guidance on products authorized under EUAs can be found here, and states that the FDA must “ensure that recipients are informed to the extent practicable given the applicable circumstances… that they have the option to accept or refuse the EUA product…”
It looks to me like every single government agency, state governor, city government, and any other entity that is enforcing the mandatory wearing of face masks is guilty, not only of obvious human-rights violations including the right to informed consent, but also of violating federal law on the emergency-use authorization of medical devices.