>>297425493
Eyebrows sure but vroid uses large flat meshes with transparent textures in front of the eyes for the outlines and eyelashes and those flat meshes are moved by the shapekeys during blink and so on. You could replace them with proper geometry in blender using the textures as guides but you'd be remaking those shapekeys and adding a ton of extra work.

Among other things vroid wants to be easy for 2d artists to pickup. With that in mind it uses textures for those parts because they're very fast to create different eyeshapes and you can use your drawing tablet or image editor to draw the eyes like you would if it was a 2d illustration. The workflow for modeling it in 3d is different. Not worse, just different advantages and disadvantages.