why wide spectrum unavailable?!

Here's what you need

• To use Voice Isolation or Wide Spectrum during a FaceTime audio or video call, you’ll need iOS 15 or later.
• To use Voice Isolation during a phone call, you’ll need iOS 16.4 or later. Wide Spectrum is not available in phone calls.
• With iOS 15 or later, Voice Isolation and Wide Spectrum are also available in certain third-party apps.

You can use Voice Isolation and Wide Spectrum on these devices: 

• iPhone XR, iPhone XS models and later
• iPad (8th generation) and later
• All iPad Pro 11-inch models
• iPad Pro 12.9-inch (3rd generation) and later
• iPad Air (3rd generation) and later
• iPad mini (5th generation) and later

In IPhone XR it’s showing wide spectrum is unavailable