Once Cognate extension was deployed to production, the usual Wikidata Phase 1 can be enabled for Wiktionary. This will allow to create interwiki links for those pages that would not be connected through the new component, such as non-mainnamespace pages and pages like https://en.wiktionary.org/wiki/Unsupported_titles/Full_stop.
Note: an abuse filter should be used to prevent unneeded item creation.
As announced on Project Chat, we plan to deploy on June 20. (deployment slot at 22:00 UTC)