Apple released macOS Catalina 10.15.6 today along with iOS and iPadOS 13.6. I have downloaded and installed all of them, everything seems to be fine. There might be problems with your Mac and/or workflow so proceed accordingly. As usual, I installed the Combo Updater on the Mac. I don’t expect any more updates to Catalina with macOS Big Sur in development. The final release of Catalina seems stable, finally. Here is a link for more information on these releases. And, if you really want to get granular, check this page for what macOS Apps were updated.