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

Players interested in automating their commands in Minecraft will have to use Command Blocks, but they’ll need to update their settings to add them into the game.

While available in Minecraft's Java, Bedrock, and Pocket Editions, Command Blocks aren't readily available through in-game menus. They are unobtainable in Survival Mode through standard play and ...