SampleFragment.kt

@AndroidEntryPoint
class SampleFragment : Fragment() {
  
    // No need to extract it here
    // private val expId by lazy { intent?.getStringExtra("EXPERIMENT_ID") }

    val viewModel: SampleViewModel by activityViewModels()
    
    .....
    .....
}

SampleViewModel.kt

@HiltViewModel
class SampleViewModel @Inject constructor(
    savedStateHandle: SavedStateHandle,
    var sampleRepository: SampleRepository,
) : ViewModel() {

    val expId by lazy {
        savedStateHandle.get<String>("EXPERIMENT_ID")
    }
    
    ....
    ....
  
}