Adding blocking behavior not working

Hi team!

I love your plugin and I’ve been using it for years! I am implementing a consent management platform these days and ran into a problem on how to add the data-block-on-consent attribute to different embedds like instagram and youtube.

My idea was to implement it in two different ways of which none of them work:

1. functions.php

add_filter( 'the_content', function( $content ) {
    if ( function_exists( 'is_amp_endpoint' ) && is_amp_endpoint() ) {
        $content = str_replace("<amp-instagram", "<amp-instagram data-block-on-consent", $content);
    }
    return $content;
}, 1 );

1. custom template single.php

$content = $this->get( 'post_amp_content' );
 $content = str_replace("<amp-instagram", "<amp-instagram data-block-on-consent", $content);

Is there any other way how to add that attribute to the AMP components?

Any help is much appreciated!

Best,

Jonas