See a few 4B movement posts around
This story, about women in South Korea who identify as part of the 4B movement, was originally published on March 8, 2023
World Without Men The women of South Korea’s 4B movement aren’t fighting the patriarchy — they’re leaving it behind entirely
I will say if you, or someone you know, is gonna join this movement make sure that you, or family or friend's, stay safe - id personally advice women NOT to tell random people on the Internet that they have joined.
Posting about online could make you or others a target for online abuse as well as the more horrifying prospect of being a target in real life.
I'd also say don't trust sharing infor via any social media DM groups because they will become infiltrated at some point. That goes for platforms like private telegram and whatsapp groups which get infiltrated all the tim.
Take care