This is not a solution, but a suggestion that might be worth trying. It does not guarantee functionality, so please think of it as just my rambling.
* Connect devices through USB to the USB 2.0 connectors on the back panel (use only the terminals directly connected to the CPU; devices that go through the CHIPSET, if removable, should be disconnected, most of the USB 2.0 ports on the back panel fall under this category).
* Try starting up with only the minimum necessary devices: keyboard, mouse, and gamepad. (Remove all other devices.)
* Only the GPU should be connected via PCIe.
* Turn off overlays for apps like Steam, Afterburner, NVIDIA App, etc. Stop unnecessary apps. (Also turn off apps included with devices, and stop third-party security software — this will reduce security measures.)
* Set the power plan in the control panel to higher than High Performance.
* In BIOS, make sure the iGPU is enabled by default and then apply drivers.
* After that, once the OS is up, uninstall the anti-cheat program once and then reinstall it.
* Check in Device Manager to make sure all devices are functioning properly.
* Launch and try playing BF6.
For those using many devices or apps, or adjusting BIOS, or if you are inexperienced, it may be troublesome, so whether or not to do this is entirely up to you. It is a bit ridiculous to go this far for a single game, after all — this is just my own rambling. Naturally, the real story is just hoping EA improves things quickly.