Copy varying range from multiple sheets and paste from same row - vba

Question

I am working currently with one workbook and want to implement a preparatory work, copy/pasting all the relevant range from my workbook contained in separate worksheets (3 worksheets at most).
I have the below code to loop through the worksheets, unfortunately I am unable to write the paste-command so as to paste these ranges from the same row successively. I want Transpose:= True. I.E Rgn from sheet1 starting from B2, after last filled cell on the right starts Rgn from Sheet2, after last filled cell starts Rgn from Sheet3 (provided Rgn exists for Sheet3).
Currently, my code overwrites what was copied from previous sheet.
I found a potential reference here (VBA Copy Paste Values From Separate Ranges And Paste On Same Sheet, Same Row Offset Columns (Repeat For Multiple Sheets)) but I am not sure how to use Address nor how the Offset is set in the solution.
' Insert temporary tab
Set sh = wb.Sheets.Add(after:=wb.Sheets(wb.Sheets.Count))
sh.Name = "Prep"
'Loop
For Each sh In wb.Worksheets
Select Case sh.Index
Case 1
Sheets(1).Range("D16:D18").Copy
Case 2
lastrow = Sheets(2).Range("A" & Rows.Count).End(xlUp).Row
lastcol = Sheets(2).Cells(9, Columns.Count).End(xlToLeft).Column
Set Rng = Sheets(2).Range("M9", Sheets(2).Cells(lastrow, lastcol))
Rng.Copy
Case 3
'Check if Range (first col for answers) is not empty
If Worksheetunction.CountA(Range("L9:L24")) = 0 Then
Exit For
Else
lastrow = Sheets(3).Range("A" & Rows.Count).End(xlUp).Row
lastcol = Sheets(3).Cells(9, Columns.Count).End(xlToLeft).Column
Set Rng = Sheets(3).Range("L9", Sheets(3).Cells(lastrow, lastcol))
Rng.Copy
End If
End Select
wb.Sheets("Prep").UsedRange.Offset(1,1).PasteSpecial Paste:=xlPasteAll, Transpose:=True
Next
Set sh = Nothing
Set Rng = Nothing

Answer 1

Can you try this? UsedRange can be unpredictable. You can also have problems if you don't have anything in the first cell of Rng, in which case this code will need adjusting.
I would also prefer to use the sheeet name rather than index.
Sub x()
Dim sh As Worksheet, wb As Workbook, Rng As Range
Set sh = wb.Sheets.Add(after:=wb.Sheets(wb.Sheets.Count))
sh.Name = "Prep"
'Loop
For Each sh In wb.Worksheets
Select Case sh.Index
Case 1
Set Rng = sh.Range("D16:D18")
Case 2
lastrow = sh.Range("A" & Rows.Count).End(xlUp).Row
lastcol = sh.Cells(9, Columns.Count).End(xlToLeft).Column
Set Rng = sh.Range("M9", sh.Cells(lastrow, lastcol))
Case 3
'Check if Range (first col for answers) is not empty
If WorksheetFunction.CountA(sh.Range("L9:L24")) = 0 Then
Exit For
Else
lastrow = sh.Range("A" & Rows.Count).End(xlUp).Row
lastcol = sh.Cells(9, Columns.Count).End(xlToLeft).Column
Set Rng = sh.Range("L9", sh.Cells(lastrow, lastcol))
End If
End Select
Rng.Copy
wb.Sheets("Prep").Cells(2, Columns.Count).End(xlToLeft).Offset(, 1).PasteSpecial Paste:=xlPasteAll, Transpose:=True
Next
Set sh = Nothing
Set Rng = Nothing
End Sub