Egl gpu offloading not working on linux

Launching __NV_PRIME_RENDER_OFFLOAD=1 vkcube-wayland doesn’t do anything on Plasma 5.25.5. Seems like EGL offloading is not working yet.
Systèm : Manjaro linux
DE : Plasma 5.25.5
GPU : RTX 2060 with optimus
CPU : intel Core i7 9750H with Iris graphics
Driver : Nvidia 515.65.01

Vulkan applications decide for themselves which gpu to use. To make only the nvidia gpu available additionally use __VK_LAYER_NV_optimus=NVIDIA_only

Already tried that but still nothing change. Btw, vkcube-wayland works fine with intel integrated

With driver 525.60 on kde plasma 5.26.4 wayland, running vkcube-wayland with __VK_LAYER_NV_optimus=NVIDIA_only segfaults, but running with __NV_PRIME_RENDER_OFFLOAD=1 __VK_LAYER_NV_optimus=NVIDIA_only __GLX_VENDOR_LIBRARY_NAME=nvidia renders an invisible window.

Edit: OpenGL works on wayland apps. Vulkan is currently broken. See issue here