There should be boss creation commands on both versions of Minecraft..

I kindly ask that you port the /bossbar command to bedrock edition, as well as make a sethealth parameter for the bossbar command that applies to all editions NEXT update. Or the 1.17 update if you have time. Why do I want this done? I want this done for the sake of bedrock edition map creators. How? The same way you did it for the Cursed books.