sharing here so more people can find it and report if facing same issue.
iGPU is AMD and discrete GPU is Nvidia. System monitor reports that GPU 0 is being used in “Application” section in Overview tab.
GPU usage is always showing 100%
GPU 3 (orange) showing 100% and GPU 2 (blue) is 0%.
KDE Plasma Version: 6.4.3
Fedora 42 Kinoite