Okay, so first - I'm not a doctor. No one on our site is.
But I'm wondering why both can't be correct. Maybe back in 2019, you had HPV. You've treated it with a lot of different things, and now you have fibrosis. Fibrosis happens when the skin is damaged and scarred tissue takes it's place.
HPV clears in 90% of people within 2 years. With all your testing, it's obviously gone for you now. Now you have scar tissue, basically.
Does that make sense?
The strains of HPV, of which there are hundreds, that affect the genitals don't affect other parts of your body. There are certain strains that cause plantar warts, for example, and certain strains cause common warts that you can get anywhere on your body, some cause flat warts, others cause raised warts. The wart on your forehead has nothing to do with the HPV found on your penis. It's purely coincidence.
For doctors, most HPV is nothing. The strains of HPV that give you warts are considered low risk because they don't cause cancer, and essentially everyone will have at least one strain in their lifetime. It's estimated that about 88% of sexually active adults will get genital HPV at least once in their lives. It's going down now with the HPV vaccines, but if you haven't been vaccinated, it's considered an inevitability that you'll get it.
I'd suggest you stop getting biopsies and such, and let your penis heal. A lot of experts recommend castor oil to help break down fibrous tissues, but talk to your doctor first. Vitamin E oil can help reduce scarring, but again, talk to your doctor first.
Continue with therapy. It sounds like - and again, not a professional here - this has become somewhat of an compulsion to figure out what's going on. A therapist should be able to help you get to a place to find peace working through what you do know, and being okay with it.
Worst case scenario is that you had low-risk HPV that's gone now and have fibrosis. That's not too bad. If the only sexual encounter you had was the woman in 2017, that's your source. If it isn't, you may never know where you got it. HPV can be transmitted even while wearing a condom, as it is transmitted by direct genital to genital skin to skin contact, and the condom doesn't cover all the skin. It can be transmitted by oral sex, but it's a lot less likely.
The incubation period can be a several weeks to several months. Unless that woman was your only partner, you may never know. Many don't. I hope you learn to be okay with that.