How to put multiple buttons and other controls in a tab in swiftUI

is there any sample code showing how to put multiple controls in a tab for a macOS app? I have an app that I'd like to use as a basis for swiftUi work, but it's not "oh look, here's some scrolly things and it's all really iOS navigation". It's a macOS app, it has specific window sizes, multiple buttons in specific places in a tab, multiple text fields, table views, popup lists, etc. Each tab is different. I can't find any good info that isn't so targeted at iOS to be useless for my needs.