`options_import_allowlist` filter not working

I am trying to add the Fluent Forms plugin options to the the default import list but it doesn't seem to be working:

`function fluentform_options( $options ) {
    $options[] = 'fluentform';
    return $options;
}
add_filter( 'options_import_whitelist', 'fluentform_options' );`

The Fluent Forms settings are still unchecked when importing.

Am I missing something?