Its mostly internet. You have to remember that social media tends to run on algorithms tend to promote what is getting the most interaction. Twitter, facebook, tiktok, youtube, etc. all curate what they suggest to you based on interaction.
Also the gender stuff tends to go in waves. I used to watch anti SJW content back in 2013 to 2016. After awhile its mostly the same stuff brought up ad naseum, or content creators have to go into more obscure corners to find more niche topics.
I remember man spreading being treated like it was a serious topic for years. It all came from 1 or 2 article that didn't even take the topic seriously.
Trans stuff and non binary stuff gets brought up because the actual population is small and they are a punching bag for politicians and brawny points for others. The news needs to push stories to get eyes, so the more obscure the better.