This is a question for AWS. Community PostgreSQL doesn't have any of these concepts, and this is all proprietary modifications to PostgreSQL by Amazon.
My understanding was that under the hood, AWS uses the logical replication features that are present in community Postgres. If that's incorrect then I'm sorry for the off-topic post.
Maybe my question can be re-summarised as: do DDL operations on temporary tables necessarily have to be written to the WAL? Is there a way to avoid that?
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