The tag schema.org, being about a way of marking up HTML documents so search engines can add rich data to their results, seems like it's a better fit over at webmasters.se. Should the schema.org questions be migrated over there?
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Out of the 20 questions tagged schema.org there are only 5 unanswered, yet only 5 questions score 1 or more vote. So if your reasoning for migration is to get greater attention, then yes flag for migration (on a case by case basis).
On the other hand WebMasters does not have a schema.org tag but for whichever questions do contain "schema.org" (16 questions) there are a relatively high number of votes and views.
What you risk by asking for a migration is the OP of the questions and answers losing ownership until they associate their accounts on WebMasters
The better approach would be to migrate a good quality question that was recently posted. Migrating in bulk just puts monotonous overhead for moderators on both sides and in addition floods the WebMasters home page.