Iron brigade on my 7900xt felt kinda strange to say the least when i learned it was locked at 30fps... some ways to increase your fps sadly also increase the game speed. HOWEVER! through the wonderful tech of lossless scaling we can increase our fps 3x or 4x without any issue.

WARNING!!!!! THIS GUIDE REQUIRES LOSSLESS SCALING

YOU CAN PURCHASE THE APP ON STEAM HERE
https://psteamproxy.yuanyoumao.com/app/993090/Lossless_Scaling/

After installing lossless scaling set the frame generation type to LSFG 3.1
Set the target frame rate to your monitors refresh rate.

Note: you can create a profile in lossless scaling and set a shortcut to the games EXE file so it doesnt stop scaling when you alt tab.

I dont normally write guides but for those who really want more fps on this game I hope this helps.