Add '3DObject' to your project first, then you will see the properties where you can add your file...
Did that, nothing shows up.
Make sure the editor and project settings are set to webgl2, not webgpu.
Set Scale higher 10-20 On 3D Object
Then do
Y Scale 0.5
X Scale 0.5
Z Scale 0.5
Then Use the XYZ on the top to rotate object properly (But most time you dont need to)
