Struggling to launch the game in DX12

Hey folks, I've been trying to launch my game via the Blacksmith launcher but every time I hit the play button it switches to "stop" and then back to play, and then the game never launches. The only time I can get the game to launch is when I add the -dx11 launch parameter in the Blacksmith launcher. I get it, "oh but you can still play the game", well it's to my understanding that the game supports DX12, so I'm trying to do a performance comparison between the two APIs.

I do have DX12 installed as I've done a dxdiag check on it and it say's DX12 is installed. Does anyone have any suggestions as to how I can get my game to launch in DX12?

My system info: CPU: AMD 5800x GPU: RTX3070TI RAM: 32gigs Plenty of SSD space. OS: Win 11 home