I have no idea if compounding finasteride myself is the way to go and if it does anything. The only objectively sure thing is that I have experienced no side effects so far. But I also have no results in the 3 weeks since I started this self made drug and it is a real hassle making it myself.
Maybe with no results, what you did to make your own topical finasteride is not working. There is a reason that compounding pharmacies do this, they have expertise that you don’t have