Chrome removed the launchpad to launch single-window web apps, but it's easy to create a desktop launcher.

First install chromium:

sudo apt-get install chromium-browser

Now, right-click desktop, add launcher and configure as following:

click on rocket icon to change icon.
Name: WhatsApp
Command: chromium-browser --app=http://web.whatsapp.com

confirm. Add to menu when asked (if desired).

For MS Teams, the tenant ID can be specified to log into a particular server immediately.

Icons to be copied to ~/.local/share/icons or /usr/share/icons/:

Telegram Desktop allows Phone Calls, Telegram Web (https://web.telegram.org/) does not.

apt-get install telegram-desktop

~/Desktop/Teams_free.desktop

[Desktop Entry]
Name=Teams free
Exec=chromium --app=https://teams.live.com/v2
Comment=Teams free
Terminal=false
Icon=ms-teams_icon
Type=Application

Google Chrome/Chromium now supports this feature naturally which keeps taskbar icons separate as well:

1. Open website
2. Click the 3 dots > More Tools > Create shortcut..
3. Check “Open as window” and press “Create”