Multi Apps API enables PWA developers to programmatically add application icons to their PWA that link into specific application features.
This is to provide the user experience of using separate apps that seamlessly integrate into the work environment, even though they might be provided by a single PWA. A VDI app might want to directly expose all the installed apps on the remote client so that they look and feel as if they're native to the local client (eg. additional launcher icons for Spreadsheet, Word processor). Currently there is no way to do this so app developers resort to various hacks to achieve it.
Samples: http://multi-apps.glitch.me
Explainers: https://github.com/ivansandrk/multi-apps/blob/main/explainer.md