So, you can use a trick to use both whatsapp (on mobile) and whatsapp web (on desktop) without problems.
You need to use 2 different icon. In the example below I will use
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whatsappfor Whatsapp and
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whatsapp-squarefor WhatsApp Web
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Add both social links inside the theme component setting: 
 a.WhatsApp,fab-whatsapp,share with WhatsApp,https://wa.me/?text=
 b.WhatsApp Web,fab-whatsapp-square,share with WhatsApp Web,https://web.whatsapp.com/send?text=
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Add fab-whatsappandfab-whatsapp-squarein the svg icon component setting.
 The result will be:
  
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Now create a new theme component, go to the common > CSStab of the component and add:.desktop-view .social-link .fa.d-icon.d-icon-fab-whatsapp.svg-icon.svg-string, .mobile-view .social-link .fa.d-icon.d-icon-fab-whatsapp-square.svg-icon.svg-string { display: none; }Add this new component in the main theme(s) of your site. 
 In this way on desktop you will have only thewhatsapp-squareicon that will send you to WhatsApp Web.
  On mobile there will be only the whatsappicon that will open the app
 
