The Get Installed Related Apps API (navigator.getInstalledRelatedApps) provides sites access to if their corresponding related applications are installed. Sites are only allowed to use this API if the native application has an established association with the web origin. The API was launched in Chrome 80. Additional support for web apps on Desktop was enabled in Chrome 140. You can find details here: https://developer.chrome.com/docs/capabilities/get-installed-related-apps
Docs: https://web.dev/get-installed-related-apps
Explainers: https://github.com/WICG/get-installed-related-apps/blob/main/EXPLAINER.md