"Is nudity allowed on Patreon?"

There is a big difference between nudity and pornography!

"Nudity is allowed on Patreon as long as it is flagged accordingly"

Again, there is a big difference between nudity and pornography!

These are excerpts from Patreon's Terms of Service...

"Pornography and sexual services:

We don't allow pornographic material or sexual services on Patreon, which we define as "real people engaging in sexual acts such as masturbation or sexual intercourse on camera.""

"You cannot use Patreon to provide access to pornographic material such as giving access to a website or shared private access to pornographic creations whether on Patreon or on any other platform. Pornography is defined as real people engaging in sexual acts such as masturbation or sexual intercourse on camera."

https://www.patreon.com/policy/guidelines