CM Punk was not seen on the episode on April 6 on AEW Dynamite however, there was a building in which he was.
Punk was indeed inside the Agganis Arena in Boston, MA. He was in the backstage area even though he was not present at the show.
Punk won a huge victory against the MJF at the Dog Collar match at Revolution back in March. He has been talking about trying to compete in the AWE World Heavyweight Championship.