to get started... try this for your form Initialization
Code:
Private Sub UserForm_Initialize()
Dim Ws As Worksheet, lr As Long, i As Long, j As Long
Dim dic As Object, arr As Variant
Dim ctrl As Control, thisFrame As Control
Set dic = CreateObject("Scripting.Dictionary")
For Each Ws In ActiveWorkbook.Worksheets
Select Case UCase(Ws.Name)
Case "FY2019", "FY2020", "FY2021", "FY2022", "FY2023"
With Ws
lr = .Cells.Find(What:="*", SearchDirection:=xlPrevious, SearchOrder:=xlByRows).Row
'for combo drop down
arr = .Range("B2:B" & lr)
For i = 1 To UBound(arr, 1)
If arr(i, 1) <> "" And InStr(arr(i, 1), "Total") = 0 And InStr(arr(i, 1), "TOTAL") = 0 Then
dic(arr(i, 1)) = 1
End If
Next i
'for labels
j = 3
Set thisFrame = Controls("frame" & Ws.Name)
For Each ctrl In thisFrame.Controls
If TypeOf ctrl Is MSForms.Label Then
ctrl.Caption = Format(.Cells(1, j).Value, "mmm-yy")
j = j + 1
End If
Next ctrl
End With
End Select
Next Ws
'populate combobox
cboFYList.List = Application.Transpose(dic.keys)
End Sub