I lost interest in food only a few months into the whole lockdown (I haven’t had Covid, and didn’t get the vaccine until almost a year later.)
I spent a small fortune buying food I thought would be interesting, and after a few bites threw it out; nothing tasted good. I even had an antibody test, because I’d heard about loss of taste, and wondered if I’d had Covid with no symptoms. But no Covid.
My brother went through this too - no Covid there either - and again, long before taking the vaccine.
There may be loss of taste and smell for some people who have had Covid, just as people sometimes experience that with the ‘flu; or as a reaction to the vaccine; but I think a lot of it is due to lack of usual exercise, and a degree of depression caused by everything that has happened, the uncertainty, confusing ‘news’ and ‘advice’ we’re given, etc.
I had Covid in October and still don’t have a sense of smell or taste.