I recommend that you see an immunologist or an infectious disease virologist that has an interest in viral mediated chronic illnesses. Even amongst specialists there are doctors who do and many who do not treat chronic post viral issues.
There are no specific approved antiviral treatments for reactivated EBV or Long Covid but there are case reports and some studies that could be used to do an off label treatment trial.
Find the right specialist near you.

Example:
https://www.droracle.ai/articles/303322/what-is-the-treatment-for-reactivated-epstein-barr-virus-ebv
Or:
https://discovermednews.com/long-covid-patients-improved-with-chronic-use-of-acyclovir-case-series-studies/