Disabling plugin updates in Wordpress via Wordpress backend (UI) - hosted in Lagoon

site-config.php

// Add this to an "mu" plugin:
if (getenv('LAGOON_ENVIRONMENT') == 'production') {
  // Disable ability to check for plugin updates.
  add_filter( 'site_transient_update_plugins', 'mysite_remove_plugin_updates' );
}

/**
 * Helper functions to disable plugin updates.
 */
function mysite_remove_plugin_updates( $value ) {
  unset( $value->response['plugin/plugin-file.php'] );
  return $value;
}