The pins are all described in schematic and if you hover over a pin in any view in the DOIT Esp32 DevKit v1 improved.fzpz file above (and I expect in the original as well , because I am unlikely to have done it.) If you post a screen shot of what you think is missing I will look further. Parts update works fine, no one much (including me) is submitting parts to github which is currently the only way they get added to core (for that matter not a lot of people are making parts at all any more …) If you are running Win7 and 0.9.3b parts update is broken and you need to upgrade to 0.9.4 to get it working again. In my case I haven’t figured out how to keep the three repos in sync so don’t even try any more. There are a lot of variants of the esp32 because there are a lot of slightly different versions (I have made or modified more than half a dozen of them.) If you own an odd board you want a part for it and by and large we have obliged. I haven’t seen a new request in a couple of years I don’t think. This was likely the last one and it is 2 years old now.
Peter