Missing Private key in CER file after installation in keychain

Creating CSR file from my Mac steps are :-

  1. Going to the Keychain Access > Certificate Assistant > Request a Certificate From a Certificate Authority...
  2. Filling the required details in the field, save to desk then continue and save it desktop.
  3. Then going to the Developer account in Certification screen and creating a new certificate on click on plus icon then selecting Apple distribution > continue , Then uploading CSR file in the required box and continue.
  4. After this I have downloaded the “distribution.cer” file then double clicked on the file then going to the KeyChain Access to see the My Certificate section there is no certificate which I have installed but it showing in the Certificate section without Private key.

This steps I have followed but not getting Private key in my certificate how to correct this issue System Configuration :- Mac OS- 14.5 Chip - Apple M1 Keychain Access version - Version 11.0 (55314)

Missing Private key in CER file after installation in keychain
 
 
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