I recommend asking a new question about the syntax error you’re getting. Show all of the SwiftUI code for the view that contains the list in the new question. There isn’t enough information in the error message and the code snippets you showed for anyone to help you fix the error. For example, you haven’t shown any code for Item. Without that code no one can tell you whether or not Item is a property wrapper.
Your original question was a general one: how to edit an item inside a list. I answered that question: use TextField for the list items. Now you are getting specific compiler errors trying to use a text field in a list. That calls for a new question.