It’s not a matter of “fixing” so much as things moving around. After bottom surgery, the vaginal canal sits between the prostate and the anal canal, so sensation to the prostate is reduced with anal sex. However, the prostate ends up sitting approximately where the “g spot” is in AFAB folk, and so is more easily accessed via the vaginal canal
It suits my needs perfectly though! You can take my folding phone out of my cold dead hands