Apple hides old OS versions from search results. To find it, you must use a direct link that opens the App Store's hidden product page.
If you need help with or want to know if your current apps will run on Catalina, let me know: What is your Mac model and year ? Are you doing a clean install or an upgrade ? Which specific software are you worried about losing? macos catalina 10157 installer upd
: For those already on version 10.15.6. It is smaller and only contains the newest changes. Combo Update Apple hides old OS versions from search results
To get a "solid" install of macOS Catalina 10.15.7, you need the full installer rather than just a "stub" or partial update file. This version remains relevant for users on older hardware or those needing 32-bit app support before moving to newer versions. Are you doing a clean install or an upgrade
softwareupdate --fetch-full-installer --full-installer-version 10.15.7