A sample repo I created, SnapCat, shows off a lot of the Parse Swift SDK capabilities such as: SwiftUI compatibility (Models & ViewModels), LiveQuery, async/await, etc.
For comparison, you can look at the iOS14 branch which only uses completion handlers. A fetch example is below (query and everything else is very similar):
The same code written using async/await is below:
There are tons of examples how to use the SDK with MVVM and SwiftUI. To highlight a one I think is super useful, is creating custom view models that automatically subscribe to live queries along with fetch on first call. This allows you to make dynamic timelines that automatically reflect updates in a social media app. The custom view model to do this is below:
Then you use it to create a timeline view like this:
Basically, any new posts from people you follow, new comments or likes, automatically are reflected on the timeline without having to refresh.