How do I transfer my music from iPhone to new Macbook (old Mac got stollen)

My MacBook Pro 17 was stollen last night, All info (my dughters pictures was there 😟😟😟😟😟😟😟 gone) I know, it my fault should have kept copies.

I have a quesion: How can I transfer my music from iPhone to new MacBook that I purchased???

This is very important, as my wife is a fitness instructor and she need her music back to computer.

Thank ypou so so much