Unable to install Boot Camp on MacBook Air

macs does not run ios only mobile devices does that

of your mac has an apple cpu then you can't use bootcamp at all

the new cpu from apple used the ARM cpu architecture where the version of windows microsoft sells rely on the intel x86/x64 cpu architecture

if you want to know more

What apple say:

Apple: It's Really Up to Microsoft to Make Windows Work on M1-Based Macs | Tom's Hardware (tomshardware.com)

What Microsoft say:

Options for using Windows 11 with Mac® computers with Apple® M1® and M2™ chips - Microsoft Support

if windows is mission critical fore you sell the macbook and get one with an intel cpu