VBA, Fill up/down rows to align with last row - excel

Question

I am trying to delete rows till it meets my last row OR fill down rows to align with last row.
Sometimes my sheet will be like below where I need to delete rows to align with my last row number.:
However sometimes my sheet will be like below, where I need to fill down other columns:
Is there a function that can do this? I am finding it hard to determine when to fill up or fill down.
Thanks

Answer 1

keeping in mind the well known caveats of the use of UsedRange, you could give it a try
Dim lastRow As Long
With ActiveSheet ' <- change it to your actual sheet reference
With .UsedRange
lastRow = .Rows(.Rows.Count)
End With
End With

Answer 2

Please test the next code. It assumes that the reference column will be the seventh one and the one to check the 0 formulas value to be the sixth one. Your picture does not contain the columns header...
Sub DeleteRowsOrFillDownDiscontinuous()
Dim sh As Worksheet, lastR As Long, lastR1 As Long, lastCol As Long
Set sh = ActiveSheet
lastR = sh.Range("F" & rows.count).End(xlUp).row
lastR1 = Range("E" & rows.count).End(xlUp).row
lastCol = sh.cells(lastR1, Columns.count).End(xlToLeft).Column
If lastR < lastR1 Then
sh.rows(lastR + 1 & ":" & lastR1).EntireRow.Delete xlUp
ElseIf lastR > lastR1 Then
sh.Range("A" & lastR1, "E" & lastR1).AutoFill _
Destination:=sh.Range("A" & lastR1, sh.Range("E" & lastR))
sh.Range("G" & lastR1, "AG" & lastR1).AutoFill _
Destination:=sh.Range("G" & lastR1, "AG" & lastR)
sh.Range("AI" & lastR1, sh.cells(lastR1, lastCol)).AutoFill _
Destination:=sh.Range("AI" & lastR1, sh.cells(lastR, lastCol))
Else
MsgBox "Nothing te be processed. Everything aligned..."
End If
End Sub
Edited:
Adapted the code for F:F column as reference, AH:AH not changeable, too and existing columns to be processed after AH Column.
Please test it and send some feedback.