您可以尝试以下方法:

<ListView ItemSource="{Binding ParentSource}">
                                  <ListView.ItemTemplate >
                                    <DataTemplate>
                                      <ViewCell>
                                        <ViewCell.ContextActions>
                                          <MenuItem Text="Delete" />
                                        </ViewCell.ContextActions>
                                        <ViewCell.View>
                                          <Label Text="{Binding Prop1}"/>
                                          <ListView ItemSource="{Binding ChildSource}">
                                            <ListView.ItemTemplate >
                                              <DataTemplate>
                                                <ViewCell>
                                                  <ViewCell.View>
                                                    <Grid x:Name="RootGrid"
                                                          BindingContext="{Binding}">
                                                      <Label Text="{Binding BindingContext.ChildProp1, Source={x:Reference RootGrid}}"/>
                                                    </Grid>
                                                  </ViewCell.View>
                                                </ViewCell>
                                              </DataTemplate>
                                            </ListView.ItemTemplate>
                                          </ListView>
                                        </ViewCell.View>
                                      </ViewCell>
                                    </DataTemplate>
                                  </ListView.ItemTemplate>
                                </ListView>

它为我工作，希望对您有帮助！

It worked for me, hope it will help you!