I too have lost my taste and smell to Covid. It will be 2 years in December. My question to you is that Metallic taste, bitter taste you described, was that after the Covid Vaccine or with the actual Covid Virus? I distinctly remember having a Metallic taste in the back of my throat pretty much immediately after getting the first Covid Vaccine. I also have Hashimoto’s. Do you have Hashimoto’s or any other Auto Immune Disease? Just curious as I’ve met a few other people who have lost their taste and smell and they also have Hashimoto’s.