Searching "Global" in the details panel of a post process volume does not provide Global Illumination as a result, but searching "GI" does.
Tested In: 4.22.3 CL#7053642, 4.24 P3 CL#10283392 , 4.25 CL#10303496
Results: The "Global Illumination" section does not appear under details
Expected: The search to display the "Global Illumination" section
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-84795 in the post.