OCLP and firmware

I've successfully installed Monterey to my 2009 Mac Pro 4.1. Now I see in the System Information its firmware marked as: System Firmware Version: 9999.999.999.999.999

This might be a silly question, but still. Had this installer I created with OCLP actually also flashed my firmware to something newer? Or I still have the old 4.1? I've been thinking about upgrading some hardware so I want to know if my computer gonna be able to handle it, being flashed.

Thank you for your answers.