I can't get the plugin to work for org files

[jsquaredosquared]

nvim-orgmode-issues.zip

The above contains a minimal config and test files to try reproduce the issue.

test.md renders fine but test.org does not.

I've checked :checkhealth for render-markdown and orgmode, as well as :RenderMarkdown log; everything seems fine, but I don't get any fancy rendering.

What can I do to get the fancy rendering in org files?