Yes this might be a case where DHT gel (Andractim) might actually work due to the up-regulation of androgen receptors.
The rest of us who had a “normal” puberty have had our penile receptors greatly shut down (down-regulate) when puberty ended, therefore the DHT application does nothing to the penile size (although it does seem to do a good job with maintaining cellular function as well as libido - just like good nutrition and exercise would).
But if your puberty never had proper closure, so to speak, you might be an excellent candidate for trying DHT application.
Everyone pretty much gets it the same way: through allsaintsclinic.org
the first time it costs more money because of the mandatory purchase of a prostate screening kit for safety. It also takes time because it is being shipped from England but I think it might be worth a try in your case.