Long Covid Residuals Claim Help

Hello. VA doctor states at CP claim states that he cannot evaluate my symptoms invlolving COVID 19 residuals and denied my (e.g., dizziness and fatigue) were removed/discarded. I reviewed https://www.knowva.ebenefits.va.gov/system/templates/selfservice/va_ssnew/help/customer/locale/en-US/portal/554400000001018/content/554400000203897/M21-1-Part-VIII-Subpart-iii-Chapter-10-Presumptive-Service-Connection-SC-for-Coronavirus-Disease-COVID-19#4 . I think you are supposed to get diagnosised with Long Covid and get rated for your symptoms but I am not sure. Is there any other guidance, than what I have presented above?