Whatsapp plugin/module floating position as in demo

I read the full instrallation and configuration manual but cant see anywhere the place how to configure this to appear as floating button same as you have on your demo site....

Please send me link to exact instruction.

Oh, yes, I just saw this and yes thanks it appearedd! I need to replace the guy on right side but I gues I can put this setting somewhere in module config, thanks!!

HOWEVER, now I just started testing and wanted to send a message same like a visitor would and to y huge surpise I was not able to ht but instead it opens web.Whatsapp application trying to reinstall on my system ??

Beside the fact that I already have webwhatsapp using in my browswer, I would expect user to be able to chat in my site windown without leaving my site, am I wrong? Is this the way you designed the app or is some config wrong?

Ooh I see, so basically the best approach would be to configure the module to appear on mobile only and use some other method, e.g. Facebook messenger or something else on the desktop to avoid that behaviour which in my view is very annoying for the user...
Do you have any better suggestion?

Is there any easy way to combine this whatsapp module with the simple floating button module and have it as one of the buttons but also add multiple other options like Messenger, Telegram etc so user can really choose his preference chat...?