Yes, blockchain in your database! well, why not!
From distributed procurement systems to logistics and of course accounting based scenarios, having ledger (blockchain) tables at your disposal isn't a bad thing... well at least I don't think so.
But, why would you need this? what problem does it solve?
Here is a longer introduction:
(3) Blockchain in your database - by David Sheardown (substack.com)
Of course, there is also the official Microsoft site about ledger tables:
Ledger overview - SQL Server | Microsoft Learn
One more, a really good video overview that shows some use cases and demos:
Bringing the power of blockchain to Azure SQL Database and SQL Server with ledger | Microsoft Learn
Episode 42 - Blockchain in MS SQL Server