This is a MIRROR only, do not send PR.
How old is your org-mode? Is it the one integrated in Emacs 26.3 (which hast org-mode in version 9.3 according to the value of the variable org-version (C-h v org-version RET) or do you use a more recent package from elpa? According to https://github.com/bzg/org-mode/commit/4f98694bf75db07386cd33aecde60c21d925b1d5 the commit that introduced the feature was in Version 9.4 of org-mode.
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ox-publish: Allow linking to encrypted Org files
1 project | reddit.com/r/planetemacs | 25 Sep 2022
org-table-map-tables doesn't respect narrowing?
1 project | reddit.com/r/orgmode | 23 Sep 2022
New babel syntax to pass src block contents as argument
1 project | reddit.com/r/planetemacs | 1 Sep 2022
Can I `#+include: "~/included_file.org"` with the included `#+title: Included File Title` as the top heading level?
1 project | reddit.com/r/orgmode | 5 Aug 2022
Tangling Multiple Files from one Org file?
1 project | reddit.com/r/orgmode | 24 May 2022