Finding and highlighting the last data point in a series/column VBA - excel

Question

I have a macro for creating a graph and part of it identifies and highlights the final data point like below:
This works all well and good when there's data in the final row of a column, but in some cases the final row is empty therefore no point is highlighted like so:
I was wondering if there was a way to make it highlight the last point that has actual data, so even though the last row may be empty, it highlights the last row with data.
Could the following be incorporated into my code? it finds the last data point in column B:
Dim lRow As Long
lRow = Cells(Rows.Count, 2).End(xlUp).Row
Here is my code:
With co.Chart
.FullSeriesCollection(1).ChartType = xlXYScatter
.FullSeriesCollection(1).AxisGroup = 1
.FullSeriesCollection(2).ChartType = xlLine
.FullSeriesCollection(2).AxisGroup = 1
.SetSourceData Source:=my_range
.Axes(xlCategory).TickLabels.NumberFormat = "m/yy"
'highlight final dot of data
.FullSeriesCollection(1).Points(.FullSeriesCollection(1).Points.Count).ApplyDataLabels Type:=xlShowValue
.FullSeriesCollection(1).Points(.FullSeriesCollection(1).Points.Count).MarkerSize = 7
.FullSeriesCollection(1).Points(.FullSeriesCollection(1).Points.Count).MarkerStyle = xlCircle
.FullSeriesCollection(1).Points(.FullSeriesCollection(1).Points.Count).MarkerBackgroundColorIndex = 6
.FullSeriesCollection(1).Points(.FullSeriesCollection(1).Points.Count).MarkerForegroundColorIndex = 1
.HasTitle = True
.ChartTitle.Text = t
ResolveSeriesnames co.Chart
.Location Where:=xlLocationAsObject, Name:="Graphs"

Answer 1

I found this code on https://peltiertech.com/label-last-point-for-excel-2007/ and made a couple adjustments which works
Sub LastPointLabel2()
Dim srs As Series
Dim iPts As Long
Dim cht As ChartObject
Dim vYVals As Variant
Dim vXVals As Variant
Set ws = ActiveSheet
If ActiveChart Is Nothing Then
MsgBox "Select a chart and try again.", vbExclamation
Else
Application.ScreenUpdating = False
For Each cht In ws.ChartObjects
Set srs = cht.Chart.SeriesCollection(1)
With srs
vYVals = .Values
'vXVals = .XValues
' clear existing labels
.HasDataLabels = False
For iPts = .Points.Count To 1 Step -1
If Not IsEmpty(vYVals(iPts)) Then
' add label
srs.Points(iPts).ApplyDataLabels _
ShowSeriesName:=False, _
ShowCategoryName:=False, ShowValue:=True, _
AutoText:=True, LegendKey:=False
Exit For
End If
Next
End With
Next
' legend is now unnecessary
Application.ScreenUpdating = True
End If
End Sub