The laptop has a built-in wireless adapter or the wireless adapter is physically installed on a computer and it does not appear in Network Connections. What is most likely the problem when it does not show in Network Connections

The wireless adapter driver software.

Explanation:

All computer systems are composed of hardware and software components. The hardware components is driven by the software components.

The operating system software is the mainly software component of the computer system, which creates the proper environment to run application software. It also runs the activities the hardware with the connection called the kernel.

Kernels are device drivers that runs the hardware components. The wireless adapter is the hardware that needs the wireless adapter driver to be recognised run by the computer.