Cant find privateKey in keychain, but doesBiometryKeyExist return true

[majloj123]

Hi, i am using this package that generate privateKey for generating signature. Im working on native module (and then also extension) in swift and i need to create signature there too. I know its possible but i need that private Key. I created keys with package and function is also returning true on if BiometricKeyExist, but when i try to create query and find the key in my swift code/module...i am always getting errSecItemNotFound (code: -25300). How that can be possible? That private key should be stored in keychain and to find it, package use code like this:

- (BOOL) doesBiometricKeyExist {
  NSData *biometricKeyTag = [self getBiometricKeyTag];
  NSDictionary *searchQuery = @{
                                (id)kSecClass: (id)kSecClassKey,
                                (id)kSecAttrApplicationTag: biometricKeyTag,
                                (id)kSecAttrKeyType: (id)kSecAttrKeyTypeRSA,
                                (id)kSecUseAuthenticationUI:    (id)kSecUseAuthenticationUIFail
                                };

  OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)searchQuery, nil);
  return status == errSecSuccess || status == errSecInteractionNotAllowed;
} 

My function in swift looks something like this (i am trying to find that private key and return, but for simplicity i will only write code to find that key...it doesnt work already in that stage):

@objc
  func getPrivateKey(_ promise: @escaping RCTPromiseResolveBlock, rejector reject: RCTPromiseRejectBlock) -> Void {

    guard let biometricKeyTag = "com.rnbiometrics.biometricKey".data(using: .utf8) else {
      return promise("Error")
    }
   
    let query = [
            kSecClass: kSecClassKey,
            kSecAttrApplicationTag: biometricKeyTag,
            kSecAttrKeyType: kSecAttrKeyTypeRSA,
            kSecAttrAccessible: kSecAttrAccessibleWhenUnlocked,
            kSecUseAuthenticationUI: kSecUseAuthenticationUIFail,
        ] as CFDictionary
   
     let status = SecItemCopyMatching(query, nil)
     guard status == errSecSuccess else {
            return promise("Error")
      }
    
    return promise("Success")
  }