u/satudaylover

I am new to realms mapmaking and was making a minigame which needs to be functional , i started making it work using command blocks but due to minecraft restrictions i couldnt make 1 hostile mob fight another hostile mob. Is it possible if i code a datapack and use it , it would work and also does the map need to support both java and bedrock since datapacks dont support bedrock and behaviorpacks dont support java , it may be mentioned somewhere i dont know but yeah.