If you’re not yet interested in installing MacOS Sequoia, you can still install system updates for MacOS Sonoma or Ventura.
To update MacOS Sonoma or Ventura, go to System Settings, General, and then choose Software Update.
Ignore the MacOS Sequoia upgrade banner and click on 'More Info' under the 'Also available' section to access other updates.
Select the updates you wish to install and click on 'Update Now'. This allows you to install system software updates without upgrading to MacOS Sequoia.