I would also like to ask for official support for this too please!
I have been looking into this - as I batch-imported a load of topics, but the formatting was wrong - so I want to batch-delete them and try again. I can soft-delete in bulk from the UI, but they are still in the database.
I find it amazing that a platform with so many great features doesn’t have any real data retention control. This could represent a regulatory compliance risk for some companies.
At a bare minimum, you should at least be able to specify a retention period (in years?) for soft-deleted items- as this would help with compliance and capacity management..