Thanks for the suggestion. I’ll look into it. I’m a bit skeptical because the changes made in Windows are persistent, the secondary function keys give quick access to some of these features (but only 3 course brightness PWM settings for RGB), but mostly because there is a device on the USB device tree that is unknown to the Linux kernel on mainline-fedora.
Maybe there is some kind of kernel configuration option that just needs to be added, but the bootloader rejects custom keys generated for secure boot. Without my own keys I’m stuck with the shim and can’t run my own signed kernel. It might be possible to set the keys by booting into UEFI with Keytool, but my motivation hasn’t carried me that far into the problem yet. I could be wrong and the unknown USB device could be unrelated, and openrgb could work. Thanks again.