Page load first, await call later using PRISM

Question

Am using Prism to implement MVVM and IOC. On every page, there are certain API calls to be performed to fetch and bind the data.
I used OnNavigatedTo to ensure that the page is loaded first, and then to perform API fetch using HttpClient, but it's not working.

It's taking time to navigate to the page as all Async/Await calls are being made from OnNavigatedTo.

What is the best approach to let the navigation happens first, and then trigger the page load/API calls in Xamarin Forms.