Separate the picture format from the sound format
Disney+’s UK IMAX guide distinguishes an expanded aspect ratio from IMAX Enhanced sound. It says supported Disney+ devices can show the expanded picture, while enhanced sound is limited to selected Android TV devices. Its current help names selected models from Sony, Hisense, Sharp and Xiaomi, and excludes Standard with Ads from that sound feature. A wider picture therefore is not evidence that the connected audio path is delivering the enhanced soundtrack.
Read labels in the correct device context
Disney+’s audio help says formats displayed directly beneath a title describe support on the device in use, while the Details tab can list potentially available formats on other devices. For enhanced sound it specifies an eligible IMAX title and DTS:X-capable supported equipment. These details matter more than a general IMAX badge. Do not assume that every television from a listed brand qualifies, or that Dolby Atmos and DTS:X are interchangeable labels for the same playback result.
Compare an actual viewing requirement
Suppose a viewer can select an expanded-picture edition but cannot find the expected sound option. Record the exact title, plan, television model and current audio setup before changing picture zoom. Check the supported-device and sound information for that combination. The successful picture mode can remain useful even if the sound feature is unavailable. If asking for help, describe the missing sound selection separately from the aspect ratio. This avoids turning a documented difference in feature support into an unnecessary picture adjustment or a claim that the whole programme is defective.
Questions, answered
Does an expanded IMAX picture prove IMAX Enhanced sound is active?
No. Disney+ documents narrower device and plan requirements for the sound feature.