Finally! After all these years someone is fixing the obvious basics. Yet still limited. Why only apps and not all websites as well?
The credential API is available for web. It is up to the browsers to implement this API. For the API to pair nice with Open Yolo, browser vendors would need to hook in 3rd party password managers. Where it gets interesting is if Apple decided to integrate Mac/iOS with password managers as well. This would allow me to bring my own password manager and have it plug into the biggest runtimes (web, ios, android)