The SharePoint 2019 January 2019 Updates have been released.

SharePoint Server 2019 (sts-x-none): https://support.microsoft.com/help/4461634

SharePoint Server 2019 (wssmui): https://support.microsoft.com/help/4461514

Office Online Server: https://support.microsoft.com/help/4461633

Office Updates: https://support.microsoft.com/help/4461514

These updates and more are posted at SharePoint Updates!