how to make a entry fill a frame?

I make a stepper in xamarin.forms but the entry is very thin I can not see the number input in it.

<Frame BorderColor="#000000" HasShadow="False" CornerRadius="23" Margin="0,0,10,0"

                                                   HorizontalOptions="StartAndExpand" IsClippedToBounds="True" Padding="0"
                                                       WidthRequest="68.67" HeightRequest="23.33" VerticalOptions="StartAndExpand">
                                                <Grid ColumnDefinitions="*,1.76*,*" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand" RowSpacing="0" ColumnSpacing="0">
                                                    <Label Text="-" TextColor="#000000" VerticalTextAlignment="Center" HorizontalTextAlignment="Center" FontSize="14"/>
                                                    <vv:BorderEntry TextColor="#000000" Text="1" VerticalTextAlignment="Center" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand"
                                                                    HorizontalTextAlignment="Center" Grid.Column="1" Keyboard="Numeric"/>
                                                    <Label Text="+" TextColor="#000000" VerticalTextAlignment="Center" HorizontalTextAlignment="Center" Grid.Column="2" FontSize="14"/>
                                                </Grid>
                                            </Frame>