Same taste/smell story! Had Covid March of 2020, lost taste/smell and now most mustards, Dijons and greens (cabbage, iceberg) taste "acrid". This is the first time I've read someone else having this specific taste change. DM me because I'd like to collaborate to find what the common ingredient might be.
Have you also gotten phantosmia with smoke/cigarette smell? The initial reports that Covid was a respiratory disease turns out to be insufficient to describe what goes on. The virus gets into your brain and scrambles it up a bit, with varying severity. (Thankfully most people don't get it so bad.) Part of that damage occurs to the part of your brain that interprets smells - hence the phantosmia. Others have had luck retraining their brain using a collection of smells in jars.