My spatial toggle switch is greyed out

Hello AppleTVLover21, 

Apple Support Communities is a great place for help with spatial audio. The related article Listen with spatial audio for AirPods Pro, AirPods Max, and AirPods (3rd generation) that you came from is a great starting point. 

Since noticing this issue have you verified that your iPhone is running the latest iOS? If not, you can find the steps for updating in the following article. 

Update your iPhone, iPad, or iPod touch

If your device is updated, the next step will be to reset your AirPods. You can find those steps in the article below. 

How to reset your AirPods and AirPods Pro

Let us know how that goes!