Spatial audio not an option

Ok so my husband and I both recently got AirPods Pro. He has the iPhone 13 Pro- iOS 15, I have the iPhone 12 Pro Max- iOS 14.8.1. We each tested our AirPods with Spotify and mine have spatial audio.. his only spatialized stereo. Why is this?? His don’t even have the spatial audio option. Is this because our software is different? Would like to figure out how to get him the spatial audio option. TIA