While you may not be able to manually download a "3.2 firmware" file from a central repository, you can check for and trigger updates through the following methods:
Firmware updates for the (model 5G13-12W-A) are primarily managed and pushed automatically by your mobile service provider (ISP), such as Rogers, T-Mobile, or Optus. Nokia generally does not provide direct public firmware downloads to end-users, as these updates are often customized with specific carrier configurations. How to Update Your Nokia FastMile 5G Gateway 3.2 nokia fastmile 5g gateway 3.2 firmware download