All Shader Texture packs for Bedrock do not work or are very limited. In 1.13 and for 1.13.1 (Bedrock), the shader packs are not shown in the world despite being applied in the resource pack section. I just got the shader pack a few days ago, and was surprised to find that nothing had changed when applied. Please look into this, Mojang, I've never used shaders in my worlds and I feel as if I would be satified if I were to have my own shaders! Thanks!😁