functions.php

add_action( 'wp', 'custom_hidden_comments' );
function custom_hidden_comments() {
    if ( ! is_admin() ) {
        $restrictions = wc_memberships()->restrictions;
        remove_filter( 'wp', array( $restrictions, 'hide_restricted_content_comments' ) );
    }
}

add_filter( 'wp', 'custom_hide_restricted_content_comments' );
function custom_hide_restricted_content_comments( $content ) {

    if ( is_singular() ) {
        global $post, $wp_query;

        if ( in_array( $post->post_type, array( 'product', 'product_variation' ) ) ) {
            $restrincted = wc_memberships_is_product_viewing_restricted() && ! current_user_can( 'wc_memberships_view_restricted_product',      $post->ID );
        } else {
            // Get current user ID
            $user_id = get_current_user_id();

            // Check if the user is member of the plan 'silver'
            if ( wc_memberships_is_user_active_member( $user_id, 'silver' ) ) {
                $restricted = false;
            } else {
                $restricted = true;
            }
        }

        if ( $restricted ) {

            $wp_query->comment_count   = 0;
            $wp_query->current_comment = 999999;
        }

    }
}