I need to export this model to unity with its materials:

This model uses a few different materials in different slots:

The green and grey materials have a random color from a color ramp in each face, which is done with the use of a lightmap pack in UV editing (like in this tutorial https://www.youtube.com/watch?v=kBrOzCxOWhM&t=339s&ab_channel=WiresoulStudio).

Is there any way for me to somehow get these materials working in Unity? I thought that maybe I should somehow bake them but I don't know if it's possible with many materials in one object and if the material itself uses a lightmap pack. I'd really appreciate any help as I really need to have the same look in Unity. Thanks!