Hey there, umair30.
It appears that you're having issues with your iPhone 12 Pro and Bluetooth devices. To confirm, are they already paired or are you trying to set those up for the first time with your iPhone 12 Pro? If not, can you provide us more details on the connection issue? That can help us determine what might be going on.
If it's a connection issue where you're being disconnected from the Bluetooth devices, check out this article as it may help: Resolve Wi-Fi and Bluetooth issues caused by wireless interference
This article might be helpful as well if the devices aren't pairing properly: If you can't connect a Bluetooth accessory to your iPhone, iPad, or iPod touch
Take care.