Currently, the only version of Minecraft that supports any of these is the Java Edition. Bedrock players can't get custom heads yet, unfortunately. Here's how to get them on Java Edition.

Using commands to get a Level 255 enchanted item in Minecraft Java 1.19 Many enchantments can be given to players at level 255, such as Looting (Image via Mojang) ...

You can get a command block in your Minecraft Java or Bedrock world using cheats and a special chat command.