someone asked same question in the discord server and the response was :
for among slimes: We've noticed in our teases on Twitter & Discord that Bedrock players were particularly upset about us not adding this game to our network. We hear you! This is something that we are planning on adding to Bedrock given if Java becomes a success. These menus in the Java edition game utilizes a lot of chest GUIs, which when translated to Bedrock, it may mess around with the ordering for phone players. We'll need to design a resource pack which benefits phone players as well as PC players, and maybe redesign the tasks so it may take some time. Creating the game on Java and using it as a stepping stone for Bedrock is the most viable option here, and I hope you understand that.