Deeplink is only working with custom scheme not HTTPS

Ionic Framework Ionic Angular
1

I´m currently working with Ionic 5 and trying to add a deeplink functionality for activating and account or resetting a password. My current solution is working in general but only with my custom scheme but not with HTTPS. Maybe I got something wrong but I want the user to click on an HTTPS link which comes in via mail and open the app instead of the browser with Https. I tested in a codepen and it´s working with myScheme://myurl.com/user/activate?link={linkGuid} but not with https://myurl.com/user/activate?link={linkGuid} .

Here is my config.xml:

<plugin name="ionic-plugin-deeplinks" spec="1.0.24">
    <variable name="URL_SCHEME" value="myScheme" />
    <variable name="DEEPLINK_SCHEME" value="https" />
    <variable name="DEEPLINK_HOST" value="myurl.com" />
</plugin>

Any ideas what I could try to make it work? I have to add that custom scheme links do not work in mails I´m sending since it´s blocked.

Thanks in advance! Cheers!