Earlier quoted context omitted.
Long Covid is mostly self reported vague symptoms, namely fatigue and brain fog. It's what happens when you stay at home too much and don't get enough exercise and have a poor diet. Isolation? The Covid 15* that many of us packed on? You will feel worse and especially more fatigued, no doubt. Not to mention being constantly immersed in an environment of fear. It's a misattribution to associate side effects of weight…
Source? Yesterday I met a woman whose husband has lost his sense of smell for 4+ months and still has not regained it. My lungs still hurt sometimes on deep breaths 6 months later.
Losing your sense of smell, even permanently, is a known side-effect of Influenza infection:
https://pubmed.ncbi.nlm.nih.gov/23948436/
The same is true for many inflammatory conditions, such as myocarditis.
As for diffuse symptoms that are most likely psychosomatic: Look into ME/CFS. These are patients which may have a very real perception of debilitating symptoms that have no tangible underlying physical cause. There's a lot of misguided activism surrounding the topic, because people don't want to be perceived as having a mental disorder, due to the associated stigma.