Can someone tell me if I'm missing a library? Protocols and other options not being offered in drop downs

I have been learning about Lists from several tutorials but I get stopped because my Xcode doesn’t present the same options the teacher is getting. Here are two examples:

  1. Tried creating a new List as instructed in Chris’s "SwiftUI- How to do Navigation in your Swift UI app"as follows:

List(landmarkData. identified(by:… --> when I try to type .identified the identified(by option is not presented in the list. Why is it not there (it is there when Chris types the first few characters)? Is it missing from my SwissUI library or something? Do I need to import a new/different library ?

  1. Tried creating a new Class as instructed as follows:

Class DataSource: BindableObject {} -> when I try to type BindableObject it is not in the presented list (it is when the tutorial teacher types the first fw letters). Again, why is it not there? Is it missing from my SwissUI library or something?

Any suggestions on how to resolve this would be greatly appreciated!

Thanks.

Andre