Use of dtoverlay and dtparam in config.txt

[ChaosNicro]

Heya,
I'm using this with FCOS 39, so that might affect things. I'm trying to disable the internal wifi as well as the two LEDs on boot. Unfortunately putting the relevant lines into config.txt inside the EFI-partition has no effect.
I did notice that the LEDs are identified as mmc0 and mmc1 instead of ACT and PWR in /sys/class/leds/. I also have a ralink wifi-usb connected, it's leds register and react correctly when writing directly to sysfs. They do however sporadically reset after a while.

Is EDK2 responsible for implementing the options in config.txt or are they exclusive to RPi-OS/Raspian?

[alsldlflglhljlk]

While you ARE using UEFI to boot Fedora (which may change a few things), I do not believe EDK II is responsible for implementing config.txt, as that is largely a Raspberry Pi specific thing to my knowledge. What you can try doing (untested idea) is reformatting the boot partition (if any) to FAT32 and renaming the running kernel to kernel8.img and booting directly from that without the use of UEFI and see if the issue persists.