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Thanks @DeinOnkelFred, what I was asking was about your VirtualBox graphics settings if you setup it like this ?

If not you could follow this Thread :

Update Wiki Installing EndeavourOS on VirtualBox 6.1

SETUP 3D Acceleration VboxSVGA with 256Mo on VirtualBox 6.1. 1/ First checked the 3D inside your VM Name settings, and let whatever graphic controler you want then click OK. [1] 2/ Close the window settings and click as below directly on the name VMSVGA of your VM [2] 3/ Then a little window appears so change it for VboxSVGA and click OK. [3] 4/ Now the VboxSVGA with 3D checked keeps right. [4] 5/ Click on the 128Mo (could be another value) then a little window appears …