How to change the code in dropdown multiple selection lsit to copy to other cells in sheet

I want to have more than one dropdown multiple selection list in my worksheet. I currently have it in B14, but i want the same code copied to include the same list in C14 and D14 etc. Right now, I have this:

Private Sub Worksheet_Change(ByVal Target As Range)

    Dim oldVal As String
    Dim newVal As String
    
    If Target.Address(0, 0) <> "B14" Then Exit Sub

    On Error GoTo ReEnable
    Application.EnableEvents = False
    newVal = Target.Value
    Application.Undo
    oldVal = Target.Value
    Target.Value = newVal

    If oldVal <> "" And newVal <> "" Then
        Target.Value = oldVal & ", " & newVal
    End If
ReEnable:
    Application.EnableEvents = True
    
End Sub

Also...Is there anyway to have more than one multiple selection dropdown list in the same worksheet?

Thank you!

Aliya

Moderation removed. Code tags are added.

Thank you, ajanson.