For anyone that prefers to make Safari updates available via Self Service, here are the standalone Safari 16.2 installer download links extracted from Apple's Software Update Server catalog...

Safari 16.2 for macOS Monterey: https://swcdn.apple.com/content/downloads/56/51/012-74032-A_9J5DGEGRED/y2js2pclu7syop1z68wtptdnaddeog4u7f/Safari16.2MontereyAuto.pkg

Safari 16.2 for macOS Big Sur http://swcdn.apple.com/content/downloads/36/08/012-82248-A_SAHUHK0ROJ/z04kizckik61f8z4fzyer6gw9mh50pbm9l/Safari16.2BigSurAuto.pkg