Hair loss and dandruff problem. Help me.

I am 21 and facing hair loss and I have a huge handruff problem as when I shave my head hair the previous year I was able to see white handruff patches stick to my skin and they weren't removing even after applying shampoo on that area or oil. When I went to doctor without diagnosing and testing my scalp or even without seeing it she told me it's male patent baldness as because of covid she don't even touch or see patient problems. Could dandruff be the reason for hair loss. The doctor recommended me minoxidil and finoxidil spray(follihold) and zisap and hvit forte with hairstrom shampoo. And recomend me to wash hair daily which isn't generally a good habit. And don't know if dandruff will get treated with it or not. Please help me.