Anyone Found Help/Explanation for Long Covid Neurological Symptoms?

Has anyone found some help and explanation for their neurological symptoms? Symptoms like tremors, dizziness, difficulty walking, tingling in legs and back, muscles twitches in legs, hand tremors, cognitive dysfunction, ringing in ears, pain and burning in toes and feet. I have these symptoms and more. I have been through MRI of brain and full spine, peripheral nerve testing, muscle function and short fiber nerve tests all in the normal range despite the symptoms. I have been on 900mg gabapentin daily with little improvement, then things got much worse after getting the booster last month. Would love to hear from some that have found help and explanation.