The Suggested Edits feature requires information from up to three distinct wiki databases: from Wikidata as well as both the source and target language Wikipedias. The Wikipedias do not have direct access to data about Wikidata items, and Wikidata does not have access to detailed data about Wikipedia pages (such as whether they are missing, are redirects, or have locally stored short descriptions); and the source and target Wikipedias do not have access to such data about each others' pages, so simply moving the suggestions table derived from Wikidata data into shared storage will not provide access to all the data we need from a single wiki, either.
A new service is needed to aggregate the needed data from the various wikis' Action APIs and compose it into a single response. Ideally, it should be a standalone service rather than another addition to mobileapps.
I would anticipate that this would take less than a week to develop. The time to deploy is TBD.