No, that doesn't track. Smell impairment (not even loss) only comes with very severe zinc deficiency- which is not happening over a single day. I lost my sense of smell over roughly 8 hours. There are also tons of other symptoms of zinc poisoning that would be very obvious. It doesn't make sense that it would do smell, but not sight or hair loss.

People have been trying to tie covid to zinc since the beginning, IMO mostly out of desperation. Zinc oral sprays were pulled by the FDA for causing permanent total loss of smell- by coating the inside of your nose with zinc. People just wanted it to be related.