Hi Erwin,
Can you try adding this through Appearance > Customize > Additional CSS:
.gb-container.gb-container-228de9bd {
position: fixed;
bottom: 0;
right: 0;
}
Add this PHP snippet as well:
add_filter( 'generate_element_display', function( $display, $element_id ) {
if ( 100 === $element_id && ! is_wp_mobile() ) {
$display = false;
}
return $display;
}, 10, 2 );
Replace 100 with the Block Element ID.
Getting the Element ID: https://share.getcloudapp.com/YEuDdrnQ
Adding PHP: https://docs.generatepress.com/article/adding-php/#code-snippets
This code ensures that your Whatsapp button only appears on mobile devices.