I had penile inversion 7 years ago.
but is there a hood that they expand out of, and what is the feeling like just in general and when touched?
I have a clitoral hood. Obviously, I can't compare the experience to a cis experience, but what I can say is that my clitoris is far more sensitive than it was before bottom surgery. I put that down to it being under a hood and lubricated now (I was circumcised previously). Of note though, I had basically no sensitivity at all there for the first couple of months after surgery, as they nerves recovered
Do any methods apart from ppt and the other one where they put anal tissue in have lube occur naturally? If so how does this occur?
Yes, I lubricate. I'm not sure what my surgeon did exactly, but I lubricate. I don't believe that is true of all penile inversion though, so it's worth researching/questioning your specific surgeon and their previous patients.
Does the inside of any of the methods feel like endogynous vaginas over time or does it feel like flat skin or whatever no matter how much time there has been?
Similar, but not the same? Texture wise, very similar, but the main difference is that my vaginal walls are less flexible and stretchy
One thing I will add though. I ended up having complications, and scarring, so I lost a lot of my depth. But even so, for me, it's still so much better than what I had before! 10/10 would do again