Pair iPhone 12 with MacBook Air for internet
How to Pair IPhone 12 with MacBook Air to connect with internet
MacBook Air 15″, macOS 26.2
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Please clarify what you're trying to do.
Traditional bluetooth pairing is not supported between an iPhone and a computer. It never has been and is not necessary.
IF your cellular provider supports the personal hotspot feature on the phone, see this document for instructions on how to use it:
How to set up a Personal Hotspot - Apple Support