Can DUPA affect the entire body? Or would body/facial hair loss be a rare Finasteride side effect?

Hi there. I’ve been struggling with hair loss for 14 months now. It happened abruptly and within 5-6 months of it starting I had to shave my head as it was noticeably thin (diffuse all over) Soon after my eyebrows, beard and body hair have all followed the same pattern. I’ve always had a suspicion it is DUPA- a biopsy done on my beard (on the sideburn) showed miniaturisation in line with AGA. My hairs obviously look miniaturised. Nobody has diagnosed me. I’ve seen 4 dermatologists.