Nasal Congestion post Covid. Help.

My brother was suffering from Covid 19. He was detected positive 25days back. After 14-15days, all the symptoms had gone, but a week later nasal congestion in the right nostril was back which was by followed a lot of pain around the right eye region. I consulted a very reputed Doctor who advised me to get an X Ray done for Para Nasal Air Sinuses (Occipital view) and now the report has arrived, I am advised to consult a ENT specialist Doctor. As per the X Ray report the following were detected the following were observed: - Opacities noted in both frontal sinuses; - Mild DNS noted to the right; and -Both Maxillary Antra are clear. Now as advised, I am going to consult an ENT specialist Doctor, but before that I thought it's better to ask this question here. So please help.