What streaming services does Spatial Audio work with?

Apple TV+ does (not surprisingly).

Hello Mellodsynth,

Thank you for using Apple Support Communities!

Based on what you mentioned, you want to know what apps currently support Spatial Audio. This is relatively a new feature, and it may take time for all developers to implement its use. But if the description of the movie you would like to watch suggests that it supports multichannel or "surround sound" audio, try the spatial audio feature.

Learn more here:

Listen with spatial audio for AirPods Pro

Control spatial audio on AirPods Pro with iPhone - iPhone User Guide

"Turn spatial audio off or on for all shows and movies

1. Go to Settings  > Bluetooth, then tap  next to your AirPods in the list of devices.
2. Turn Spatial Audio on or off.

By default, spatial audio makes it sound like the audio is coming from your iPhone, even when your head moves. You can change this behavior so that the audio sounds like it’s following your head movement. Go to Settings > Accessibility > Headphones, tap the name of your headphones, then turn Follow iPhone off."

If the media is not compatible with spatial audio, you will see a message indicating that on your screen.

Best wishes!

Knew I was missing one.

I can tell you from personal experience these work:

Hulu

HBO Max

Peacock

Netflix, BritBox and Amazon do not.