I just install Linux Mint's WebApp Manager. Its a simple python program that does what you're looking for and its in the AUR. https://aur.archlinux.org/packages/webapp-manager. Source: about 2 years ago

If you only use firefox you can install this (yay -S webapp-manager) web app manager that can create a web app for any site with firefox. Since whatsapp is a simple app you should be good. Source: about 2 years ago

Here's another alternative: use the webapp client for discord. I use webapp-manager for many web apps. You could create multiple webapps running different discord accounts. Source: over 2 years ago

Even PWABuilder, a Microsoft-led open-source initiative aimed at helping developers upload their PWAs to app stores, acknowledges that PWAs making it onto the Apple App Store often do so due to oversight by reviewers rather than compliance with the guidelines. - Source: dev.to / 5 months ago

I'm trying to package this page (https://gizmoware.net/pwa_test/) into an APK PWA using pwabuilder.com, and no matter what I do I get the dreaded URL bar and "asset links verification failed". Here's my process:. Source: over 1 year ago

While I can’t guarantee it will work, you could try to use http://pwabuilder.com to create a APK that you can sideload. Source: almost 2 years ago

The easiest and most secure way to distribute a desktop application is as a PWA (Progressive Web App). Microsoft has started encouraging this method and has provided tools to help (pwabuilder.com). Source: almost 2 years ago

Didn't see an actual link, but the tldr is https://pwabuilder.com. Source: almost 2 years ago