It is not the usual doctor stuff, but it should be.
I was misdiagnosed my whole life even though it was obvious there was some maternal genetic (metabolic/mood/immune) issues passed down through my family. It was only my own efforts at understanding genetics and the role nutrition plays in creating and controlling oxidative stress was I able to ween myself off of medications (many of which made me worse because breaking them down caused even more oxidative stress).
The research fails at being implemented because these are polygenic disorders. ME/CFS can be caused by several different genotypes, so they will have to look at each person individually for answers.
Doctors do not care about nutrition and they do not yet understand the viability of vitamins as cures or prodrugs. I had a doctor yelling, yes yelling, at my friend saying she was not anemic and did not have a B6 deficiency. She went to another primary care doctor and she confirmed the anemia and when's he had her serum B6 tested she had a serious deficiency. The doctor put her on B6.
Since I was a child I had mood issues (Anxiety, Depression, Bipolar, Aspergers), fatigue, chronic muscle pain (lactic acid), and immune disorders (Ankylosing Spondylitis). It turned so bad I could not work anymore and have been on disability for 20 years. Yet, I getting any type of non routine test is a battle and when I do, and they are off, they just shrug. Why not look into it more so I can start working again? And it will be the same battle for people with Long Covid.
Regardless, Manganese (not magnesium) has changed my life pretty drastically. I do not think there is a final solution for me since my condition is genetic, but what I have done helped more than any medicine I have ever been on. And when I tell my doctors they say; "Well, I am glad that worked for you." They are not even interested.
Without knowing your genetics or having labs you can test with some supplements, but just know if you have a bad reaction that still tells you some good information! But a bad reaction is a signal what you are taking should be stopped.
Understand haw oxidative stress is controlled in the body and you will make great progress. For example, exercise increases oxidative stress, so, long covid...ya know?
If you don't mind my asking, what kind of practice do you do? This sounds very different from the usual general practitioner family doctor stuff.