It goes pink because all your materials are using builtin shaders. If you replace the shaders on your materials with URP shaders they will go back to normal. Unity has some features to do that automatically for you depending on which URP version you are using. Converting your shaders | Universal RP | 12.1.14
What we always recommend tho when working with Needle Engine and glTF is to use the PBRGraph shaders (there is one for lit and one for unlit materials) because it supports both urp and builtin and also has a lot of features builtin like transmission or iridescence (here is a sample Needle Engine Samples)
