Sending a whatsapp does not work, only in IOS

Hello I have a problem, I have a button with a link to send a whatsapp, for android works perfectly. But IOS does not open the conversation.

This is my code:

HTML:

<a [href]=“makeUrl(propiedad)”>
< button class=“button-footer”>
< ion-icon class=“icon-footer” name=“logo-whatsapp”>
</ button>

JS:

this.trustedDashboardUrl = this.sanitizer.bypassSecurityTrustResourceUrl(“whatsapp://send?text=hello&phone=”+AppSettings.whatsapp+"&abid="+AppSettings.whatsapp);
return this.trustedDashboardUrl;

CONFIG XML:

< access launch-external=“yes” origin=“whatsapp:" />
< allow-intent href="whatsapp:
” />

Dude ,how did you solve it?