Most custom things from the Hermitcraft are not available for bedrock, unless you are on an android world (single player). If you want things like the dragon dropping items always on death, you can do that with a behavior pack. Say things like the heads, you are not able to do without mods. I don't know if you have cheats enabled, but say something like the nether star summoning in a wither, is probably possible with command blocks. If you want things like the tag game data pack, that is not possible in bedrock edition. Things like the custom scoreboards, are not available yet, but hopefully will be soon.