Doesn’t work, No docs?

Hi @technicalx,

We’re really sorry for the delayed response. Anyway, we just checked and TOC block was working fine on our end. So, we will have to investigate your website to resolve the issue as soon as possible.
Please create a support ticket through this link: https://wpdeveloper.net/support/new-ticket/

Our Technical Support team will get back to you.

Thank you

Did you test it within Group blocks too?