Excluding iPad from is_mobile

Hi Team

Sorry for the poor writing I’m in trouble
The problem is that the filter doesn’t work..
I want to Excluding iPad from is_mobile

The filter doesn’t work even if I add it to function.php. Where is the problem

The filters you have prepared are below

/**
 * Check is browser mobile
 */
public static function is_mobile() {
  if ( empty($_SERVER['HTTP_USER_AGENT']) ) {
    $is_mobile = false;
  } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Android') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Silk/') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Kindle') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'BlackBerry') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mini') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mobi') !== false ) {
      $is_mobile = true;
  } else {
    $is_mobile = false;
  }

  return apply_filters('swift_performance_is_mobile', $is_mobile);
}

The filter I set is below

function my_swift_performance_is_mobile( $is_mobile ) {
if ( empty($_SERVER['HTTP_USER_AGENT']) ) {
  $is_mobile = false;
} elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'iPad') !== false) {
  $is_mobile = false;
} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)
  || strpos($_SERVER['HTTP_USER_AGENT'], 'Android') !== false
  || strpos($_SERVER['HTTP_USER_AGENT'], 'Silk/') !== false
  || strpos($_SERVER['HTTP_USER_AGENT'], 'Kindle') !== false
  || strpos($_SERVER['HTTP_USER_AGENT'], 'BlackBerry') !== false
  || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mini') !== false
  || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mobi') !== false ) {
    $is_mobile = true;
} else {
    $is_mobile = false;
}
  return $is_mobile;
}

add_filter('swift_performance_is_mobile','my_swift_performance_is_mobile');