He was mentioned on the initial PR for the April 6 CC. The updated PR could have just been a copy paste, but it actually would take someone to manually remove his name from the copy paste job to make it accurate. So pretty sure there's a reason it was removed, and most likely because he won't be on the call.

The reason for that is unknown. It is possible he'd be busy on the FDA call with Nitya Ray at that same time, but I gotta believe the whole executive team would be at that so probably not the case.