Hello Kavitha,
As far as my knowledge goes you do not need to create an apk for a PWA application sharing the URL should be enough, and depending on the users browser it enables different options for full support it advised to use a chromium browser when using a PWA. There are options to add the PWA app to your homescreen or to create a shortcut on you tablet or mobile device, however it stays a web app so no need for apk building.
Please read also the documentation:
https://docs.mendix.com/refguide/mobile/introduction-to-mobile-technologies/progressive-web-app/
Hope this helps,
Good luck!
Hello Kavitha,
I dived a bit further it is possible to create a kind of apk and publish to the play store, it is not standard but it is possible:
https://medium.com/mendix/publishing-a-mendix-pwa-in-the-google-play-store-4084a5530224
Check out this blog where they describe it step by step
Hope this helps
Good luck!