First thing, I’m glad the BIOS works for you. Are there any glitches / strange behaviors? Would you mind uploading some screenshots of the BIOS, just for validation only?
Moving onto your question: I don’t play COD: Warzone personally but a quick look at the requirements shows that the games requires TPM2.0 and Secure Boot. For Secure Boot, you just need to disable CSM and turn it on in the BIOS, but for TPM2.0, you might need to connect an external module through the DEBUG header. A guide for that is already present on this forum.
Side note: Resizable BAR is included by default, and you can enable that (and Above 4G Decoding) in the PCI Subsystem Settings menu for a bit more performance.