Looks like it.  They just can't sell it specifically as a treatment to covid-19.  Which is fine. There's no way it's been tested for that, so it's at best unethical to sell it as such.  I'm sure it is at least somewhat effective against covid-19, and lots of other things, and I'd look into it if I had it.  But if you're going to make claims like that, you need to be able to back them up.