The only command I see ingame is the /chunkinfo but in a Tutorial he has all the commands

The commands require op to use by default. You can change this with a permissions plugin, but otherwise you will need op.

How do I give op to the bot tough?

The bot? There is no bot. I'm not quite sure what you mean.

Sorry if I don't fully understand your question. What platform are you currently running under? Paper, Fabric, etc.

Commands should be available with the permission chunky.chunky or with OP. If in single player, please enable cheats on the world.

I think this is the problem, is there a way to run it with forge?

There isn't any version that runs natively on Forge currently, on 1.12.2 you can use the Sponge version if you have it installed as a mod on your server.

But there is no way to run it on 1.16.4?

No, because there is no sponge implementation for 1.16.4

Okay. I'm sorry for asking such dumb questions tho and thank both of you very much
have a nice day

@AimPizza I apologize, I should have been more clear. You can run it on 1.16.4 HOWEVER you cannot run it with Forge mods. If you use something like Paper or Fabric, you can run on the latest version.

He's trying to run it on Forge. There isn't a native Forge version yet for 1.16.4, nor is Sponge updated to 1.16.4 yet. It should be possible eventually once Sponge updates.