Since it worked yesterday but suddenly stopped, this points to a software or Bluetooth stack issue rather than hardware. The fact that re-pairing connects briefly and then drops again is a strong clue. Here's what to try:
1. Reset your AirPods Pro — Put them in their case, open the lid, press and hold the button on the back of the case for 15 seconds until the light flashes amber then white. This does a full factory reset of the AirPods. Then re-pair them to your iPhone.
2. Reset Network Settings on your iPhone — Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This clears all Bluetooth pairing data and Wi-Fi passwords. After it resets, re-pair your AirPods and any other Bluetooth devices. This is the most reliable fix for persistent Bluetooth connection issues.
3. Check for iOS updates — Go to Settings > General > Software Update. A bug in the current iOS 26 build may be causing this.
4. Check for AirPods firmware update — Connect your AirPods to your iPhone and leave them in the case while charging. Firmware updates install automatically in the background. You can check the current firmware under Settings > Bluetooth > tap the (i) next to your AirPods.
5. Sign out of iCloud and back in — Some users find that iCloud-linked Bluetooth sync issues are resolved by going to Settings > [Your Name] > Sign Out, then signing back in.
6. If none of the above work — Try pairing the AirPods to a different device (iPad or Mac). If they connect and stay connected there, the issue is with your iPhone's Bluetooth. If they drop on all devices, the AirPods themselves may need service. Visit getsupport.apple.com.