I have lost 3/4 of my hair, regenera activa stop the shedding? (Photo)

I had Covid and had diet before that and nows it's been 1 year and I have lost 3/4 of my hair. My hair is shedding and it's coming out from the root. If I touch my hair they fall too and generally shedding. I don't know if its alopecia or because of Covid but it's been one year and not stopped not even minoxidil helped me. I don't know what to do doc has recently told me that regenra activa I want to ask that will this atleast stop the hair shedding if not te grow the old hair.