Thank you for your answer!
I don't want to sound ignorant, but as I understand, I would have to make a new material in Godot, with the albedo (the color) set as the texture then just set the specular and metallic as 0 and 0 (if I remember correctly, I rarely use them), because in Godot the models have built-in materials that can't be changed, only reassigned to custom materials. If I do that, it will fix it, but I advise you to fix the issue on the root level, so people don't have to tinker with the materials.
Again, sorry if this sounds anything close to being harsh or anything, I want to be helpful and my english word knowledge is not that great.