One of the biggest manga of the last few years (Kaguya-sama) had a spinoff created just for fanservice and lewd jokes. Web manga artists are opening pixiv accounts just to draw hentai of their characters for people to enjoy. Heck web manga as a whole are giving cancelled titles the ability to be continued regardless if the company won't. Shit every season of anime is still dominated by the popularity of its hot waifu with no signs of that changing with how much it is blowing up formerly niche titles (Call of the Night, Dress-up Darling, Tomo is a Girl).

I don't doubt it is happening in some places, I simply don't believe it'll make major waves on the industry as a whole for a bit longer due to the nature of the industry itself.