Nikon DSLR Camera to MacBook Air

Two approaches:

Simply get a micro USB to USB-C cable.

or

A dongle that has SD card capability and a USB-C connector.

Personally, I purchased this dongle and it works just fine and has both USB-C and USB-A connectors:

https://www.amazon.com/uni-Adapter-Supports-Compatible-MacBook/dp/B081VHSB2V/ref=sr_1_3?crid=1YPOYXMKN08LY&keywords=uni+sd+card+reader+usb+c&qid=1658234316&refinements=p_76%3A1249137011&rnid=1249135011&rps=1&s=electronics&sprefix=uni+usb+sd%2Caps%2C92&sr=1-3

There are many other types available with a quick search on Amazon.