A newly signed certificate does not show "CERTIFICATE WAS SIGNED BY:" when listing the certificate.
All the other signed certificates show the following information:
PRIVATE KEY SIZE = 2048
PRIVATE KEY TYPE = RSA
ALGORITHM = sha256WithRSAEncryption
NOT BEFORE = 2020/03/06 00:00:00 UTC
NOT AFTER = 2022/03/06 23:59:59 UTC
CERTIFICATE WAS SIGNED BY: ACID(CERTAUTH) DIGICERT(FTPROOT) ==> missing
Release : 16.0
Component : CA Top Secret for z/OS
In order for Top Secret to add the "CERTIFICATE WAS SIGNED BY:" to the listing it needs to find the certificate on the secfile.
If the signing certificate was not added to Top Secret then it is unknown and therefore will not add the "CERTIFICATE WAS SIGNED BY:" statement to the listing.