Migrating
I am trying to transfer data from my iPhone 11 and Win7 laptop to my new MacBook Air and I am unable to do so. Any help is appreciated.
This Apple Support article outlines how to migrate from a Windows PC to Mac: Transfer from PC to Mac with Migration Assistant - Apple Support
There's a good third party article on this here: https://appleinsider.com/inside/mac/tips/how-to-switch-from-pc-to-mac-and-migrate-your-data-from-windows-to-macos
The above should handle the PC-->Mac side of things.
The phone is probably best handled by iCloud.