I'm a long term sufferer after contracting covid five years ago but with it manifesting as neurological rather than chest related symptoms as in your case susytish.
Last year I had a full hysterectomy to treat ovarian cancer and I was very hopeful thinking that it was that which was causing me to feel so poorly all the time and that my health would improve in due course.
Thank God, I got the all clear with my CA125 blood count dropping from 192 to 8 but the dredging fatigue, the constant on the edge of flu feeling, the inner tremors, have not gone away.
Long covid as a diagnosis is so hard as no-one really knows how to make such a tremulous bunch of symptoms into a coherent whole. So we're still in the dismissive "it's all in the mind" territory, sooo frustrating and insulting when every day is a struggle to try and make sense of what's happening to your body and trying anything & everything to achieve some kind of wellness.
Would it be possible to provide a link to the research you mentioned keeping quiet? I read all the science I can and this seems to go against all the findings so far.