Footnotes Group block does not render blocks placed below

Yeah I don't think they can without some complex fragile code that hunts through all paragraphs, layout builder, XB to see where it's used, or alternatively an computationally expensive pre render of entire content item.

Would suggest you use the JS option which handles new elements appearing on the page e.g. via lazy builder/big pipe. That should render them.

@scott_euser, I've tried the JS option as well and that setting does not resolve the issue.

Okay thanks, will keep this open until someone can contribute a fix. Would expect drupal js behaviours not to get triggered until page is fully loaded so sounds unexpected to me yeah.