You cannot use 'Month'. It is a function built into Access. It's not even part of the SQL specification.
I assume you're using the Select method on a Datatable object to filter records. The supported query language is described here
You would have to create a range of dates, not just the month number, like:
DateRow filtered = table.Select("DateCol >= #9/1/2022# AND DateCol <= #9/30/2022#");