This carrd is a good summary on what endos are and why they're damaging to the OSDDID community but if you want to see the science behind the disorder they cosplay having, I recommend starting your research here
Specifically these publications will be most helpful:
Why you shouldn't be getting DID info from YouTube and Tiktok
A basic understanding of how complex dissociative disorders develop
A great paper on past beliefs and controversies surrounding DID <- personal favorite as it debunks myths that endos are currently re-popularizing
This video is a good basic intro to how trauma shapes your brain
Information on the very impressive woman from the above video
Provides information on the massive role that misinformation from Tiktok has in this spike of self-reported non-traumagenic plurality <- this coupled with the statistic above that only 5% of surveyed Tiktoks about CDDs were accurate... 🙃