If you're specifically looking for a encoded version of the episode, that refers to a video compression format (smaller file size, similar quality to H.264). Availability depends on your source — it's common in high-quality scene releases for archiving or Plex/Jellyfin servers, but not officially sold as "HEVC" directly. You'd usually find it in MKV/MP4 files from release groups.
Since you specifically searched for the (High Efficiency Video Coding) format: superman & lois s02e11 hevc