Signing Identity not showing in dropdown

I am not able to access signing identity in following option, anyone can help to resolve this issue,
I have added all certificates.

I assume you are on a Mac and wanting to build an iOS app. Always good to state the operating system and version of SAB you have installed. It saves us time.

Have you read the iOS documentation on obtaining a Signing Identity and followed it step by step to add it to your project? Please read again and make sure you did not skip a step.