Can’t figure out what this is, HELP?!

hi everyone, ive recently been to a dermatologist and around the first week of January this year he diagnosed 2 genital warts , said hpv and froze them off.

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but what is all this dark brown grayish area on my shaft? just want my dick to look normal again lol. he prescribed me a cream saying it was a rash, but its been about 5 days using it everyday and it doesn't look different. any ideas? cant get a second opinion right now, all other dermatology offices are booked until july 2022** **