'Is there a way to send connection requests to local devices through an app?

What I'm visualizing:

4 different devices each running the same app while connected to the Internet via their cellular networks. Is there a way I can broadcast connection requests to all these devices, considering that they're not on the same local network?

I don't have any solid ideas on how to achieve this, maybe something in the the Bluetooth/Wi-Fi Direct (PAN) space?

react-nativebluetoothexpowifi-direct


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