have you checked if the device is supported and is recognised?
Mine just updated to 2.80 via yay though I have saved the developer flags.
You should upgrade all the components to the git version:
openrazer-daemon-git 2.8.0.r0.g95e7307d-1
openrazer-driver-dkms-git 2.8.0.r0.g95e7307d-1
openrazer-meta-git 2.8.0.r0.g95e7307d-1