I’ve been looking into reproducing the extraction of unredacted data. Found this, and it’s speculative, but Magnet Forensics has an internal “infomercial” on reconstructing content from notifications, too.

“find the inclusion of this information interesting because there is a chance that this still contains communications even when the record has been deleted from the sms.db file. I've yet to find definitive proof that this is the case however and it's possible that it is purged at the same time as sms.db is cleared.”

From: https://web.archive.org/web/20220120174606/www.doubleblak.co...

See also: https://theforensicscooter.com/2021/10/03/ios-knowledgec-db-...