The reason for the study was finding my son, who I did not know where he was for 17 years due to the hidden adoption of my son. He was then going by a girls name and was transitioning.
That said I have often initiated studies of the left and their operations. So I decided to examine everything transgender. Their common phrases such as sissy, ladyboy, femboy, and so forth. I also studied demographic information, the methods they use to change their bodies, surgeries, acceptance rates, sexual information and more. I literally examined the whole topic in extreme detail even accepting that I would need to examine porn to understand it fully.
I found dempgraohically the only race not found performing transitions would be Native Americans (including in Canada) or Australian Aboriginals.
There is in adult porn a reasonable level of content for each of the different sub-genres of the transgender types in all races that are present.
In books I did less research, this being the main area I did not go to so much.
The critical area of study, when a bias of quite a severity was noted, was in Adult Porn Video Games.
In the targeted content there is a deviation level not seen in nature. In short the odds of the content having so many white beta males with a female in their life who is pushing them through the sissification process. If only one of those dempgraphic traits was there the odds of this happening would be far more difficult to accept than winning the Powerball Lottery with a single ticket made at random. All together the improbability is comparible to predicting the Sun with go Nova on a specific day next week and it coming true. These level of statistics are just not found in nature and cannot be a random occurence.
As the study progressed the likelyhood of a single adult porn video game being one where a female with authority/influence/power over a young white beta male, where the female would use a method common for all of the females to do to 'sissify' the boy would be approximately 96%.
Even the other content, where the possibility of being a black male, or a latino male, or an asian male, often comes with an asterisk. In many cases they simply added a colorization option to the games in question and these were not a strictly other race than white situation.
The only alternative to transgender adult porn games is Futa Games and those have the content based upon the birth sex being a mix of the two genders, not of the protagonist going through a process to become female.
In the search through content only 1 game was found where the protagonist started as transgender in belief. The rest had the female in their life push them, or had another mechanism that forced the protagonist to be female (magic, technology, or game shows were the main alternatives).
In the forums for these games it is often alluded that the designer either went through the process, or knew someone first hand who came out as transgender as a minor. While this was only peridically found there was no alternative talk in the forums.
Some content exists where a protagonist will have sex with a transgender, in those games there is extremely rarely any talk of the process happening and instead there was just acceptance that the sub-character was already trans from the start. In less than 5 cases was there any content were a secondary character was made transgender by the main character and the process was always extremely abbreviated in nature.
A super majority of these games are incomplete, and a lot are under different software that often was difficult for me to install at all.
A further study indicated that most games obtained funding via Patreon, SubscribeStar, Itch.io and other such websites. While exact figures are impossible to obtain, a random sampling and deductive work indicates there may be as much as $10 million in funds per a month going to games of this content. This includes games that have been sitting as inative for years.
All of this is obtainable by others and therefore can be validated without issue by peers.