Desktop app for MAC
To install the application in the DOC menu, you need a button on the right side of the Google Chrome address bar as shown in the picture below
Check the box next to Open in a separate window
The application icon will appear in the dock
And the application itself will look like this

If there is no create app button in Google Chrome?

You need to go to Google settings, select the item More tools / Create shortcut (label)
and in the dialog box, check the box Open in a new window and click the Create button
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