To find out about the changes regarding nudity on Twitch, have a look at these websites:
https://www.bbc.co.uk/news/technology-67715846
https://www.independent.co.uk/tech/twitch-adult-content-rules-nudity-b2463932.html
18-12-2023: Twitch has now cancelled their policy changes.
https://www.bbc.co.uk/news/technology-67747949
https://www.theverge.com/2023/12/15/24002779/twitch-artistic-nudity-policy-cancelled