1. In the beginning, I created a 3d model.
Complete model of boards from all sides (all polygons, textures of all sides)
The whole model has one uv and, accordingly, all the board images in one texture.
2. After that I bake Duffuse and NormalMaps from the model. After that, I baked all the other cards in knald.
3. Created a plain and imported it into unreal engine 5. In unreal, a simple material was created with inputs for all maps. A material instance has been created and maps are connected.