xcode16 beta not support iAd

May I ask how to adapt to devices using ADClient under iOS 14.3? xcode version: 16.0 beta (16A5171c) error message：Use of undeclared identifier 'ADClient'

  if (@available(iOS 14.3, *)) {
    NSError *error = nil;
    NSString *token = [AAAttribution attributionTokenWithError:&error];
  } else {
    if ([[ADClient sharedClient] respondsToSelector:@selector(requestAttributionDetailsWithBlock:)]) {
        [[ADClient sharedClient] requestAttributionDetailsWithBlock:^(NSDictionary<NSString *,
                                                                      NSObject *> * _Nullable attributionDetails,
                                                                      NSError * _Nullable error) {
            
        }];
    }
  }