Hunting for the thumbprint for a cert on my IBMi

I am working on a project to write some code for a company and they are
requiring TLS1.2 communication. The company is not IBMi knowledgable (they
are Linux and Windows folks) and I have next to no knowledge about
certificates so we are stumbling around in circles in the dark.

We installed a certificate on my IBMi that their software generated and I
have been asked to provide the thumbprint. I did a google search on where
to find the thumbprint and I did not find anything helpful. The pages would
tell me to find and click options that are not on my screen. The only thing
that I can find close to what the internet says a thumbprint looks like is a
serial number. Are they the same thing? Google seems to think that answer
is no.

Can anyone tell me how to find the thumbprint for this cert? It is running
7.3 so I can't ask IBM.