Hey, I'm not sure what the issue is with textures/UVs when importing to Godot:
Magicka:
Godot: 
It is most likely a problem with godot that you can easily solve, follow this tutorial (from minute 3):
If it doesn't fix the problem try to increase the digits in the UV coordinates, here is a guide:
https://github.com/davidevofficial/voxel_optimizer?tab=readme-ov-file#enable-man...
lemme know how it goes :)