You are most likely looking for ngAfterViewInitwhich is launched after the component and all its child components are initialized.
Of course, this depends on your specific use case, since when loading asynchronous data, there may be some inconsistencies that may be required for processing in different ways (for example, monitoring async changes in @Input () properties, but in this other).
doc ref:
https://angular.io/guide/lifecycle-hooks#lifecycle-sequence