I’m using an updated IPhone right now.
I turned off JavaSCRIPT from within settings |Safari etc..
A page opens up asking to load a captcha screen. I copy the link and follow the instructions on a separate tab.
I’m able to post without issues.
If I want to just read and follow along I turn on JavaScript since that’s the only way I can see links to replies and scroll to latest post.
Only thing I can not see is my (you)’s which defeats the whole purpose of 8chan IMHO.
Able to post without issues.