Here’s the release history for Microsoft SQL Server 2019. Each update is linked to its Microsoft knowledge base article with the download and the list of hotfixes included.
Since SQL Server 2017, we only get Cumulative Updates and GDRs (security fixes), not Service Packs. That makes support end dates a little simpler:
- Mainstream support ends 2025/01/07
- Extended support ends 2030/01/08