My iPhone 15 Pro is not connecting to Bluetooth

Yes. First, try to enter the Control Center by swiping downward from the top right corner of your device when it is unlocked and disable Bluetooth then enable it again. If this doesn't work, go to settings > Bluetooth then disable and enable it. Bluetooth devices that are already paired can automatically connected our you can hold the Bluetooth icon and tap on the device from Control Center. If these don't work, please try hard resetting your iPhone. Hard Reset: Press and quickly release volume up > press then quickly release volume down > press and hold side button until you see the Apple logo.

2 replacement phones, 1 complete os reset, still having Bluetooth issues on the 15 Pro Max. The absolute worst Apple product I’ve ever had. None of my other Apple devices or non apple devices have the disconnect issues I have on this iPhone 15 (and I’m essentially on the 3rd iPhone 15 they’ve provided after many hours on the phone with Support, going into the Apple Store, doing a complete wipe of the 1st phone and being sent 2 replacement phones). Apple Support tried via multiple cases, multiple upper level support engineers, no fix. I believe the iPhone 15 is a lemon, they must know it has Bluetooth issues and have no intention on fixing. Disconnects from devices daily, won’t connect without total restart of phone or Bluetooth, and/or static during connection. Doesn’t matter the device I’m trying to connect to.

To what device are you attempting to connect?

Is that device in pairing mode?