Answer
Do PWAs work on Windows?
Yes. On Windows, installing a PWA through Chrome or Edge adds it to the Start menu and taskbar, gives it its own window without browser chrome, and lists it in Windows Settings → Apps alongside native applications, where it can be uninstalled the same way. Microsoft also historically indexed some PWAs directly into the Microsoft Store via PWABuilder.
Installing
From Edge or Chrome, click the install icon in the address bar (or the three-dot menu → Apps → Install this site as an app).
OS integration
Installed PWAs get their own taskbar icon, appear in Alt-Tab separately from the browser, and can register file associations and protocol handlers.
Store distribution
PWABuilder can package a PWA as an MSIX for submission to the Microsoft Store, giving it discoverability alongside native Windows apps.