I am not sure what is the purpose of having Page Break for you without any content..
but still i tried by adding a table on a report with one column and hide that and it works
Step 1
Create a DataSet with query (commandtext)
Select 'A' AS GRP
UNION
Select 'B' AS GRP
Step 2
Insert a table & set DataSetName as created in step1
Step 3
Click on Table Group & press F4 to Set Page Break Properties value,
Set BreakLocation to Between & PageName to =Fields!GRP.Value (See screenshot for your Ref)
Step 4
From above Step you will see report break into 2 page as there are 2 records from query step 1.. Now next step is to Display Page Number for the insert PageHeader
Step 5
Insert Page Header with textbox expression value as
="THIS IS PAGE " & CSTR(Globals!PageNumber)
Last but not least, Hide unexpected table columns (TextBox) as you just want to display Page Number or Page Header
Output of the report will be like
