Hi Sean,
Welcome to Microsoft Community.
I'm sorry to hear that you're experiencing issues with your Surface Headphones 2+ on your iPhone.
Test connecting your Surface headphones to another Bluetooth device (like a laptop or tablet). This will help rule out whether the issue is with the headphones themselves or specifically with your iPhone.
Check for Interference: Bluetooth signals can be disrupted by other nearby devices or even Wi-Fi networks. If possible, try using the headphones in a different environment, like a quieter room or away from other electronic devices, to see if the connection stabilizes.
If none of this works, there may be a deeper compatibility issue between the Surface headphones and iPhone's Bluetooth stack. It could be worth reaching out to Microsoft Support again or consider testing the headphones with another Bluetooth device like a laptop for further troubleshooting.
Your SincerelyHahn. W - MSFT | Microsoft Community Support Specialist