Minecraft - Item Motion stops when player is too far?

I wanted a factory in Minecraft that works fine right now. I did not type the items on the assembly line but always changed the item motion on a certain slab. Looks extremely smooth, but now there's the problem that the item motion stops when the player is 10 blocks away. Is there any way to fix that?
So that the item motion is always carried out or something?

Is a Spigot 1.16.1 server on which I build that with a buddy.

Would be nice if someone who knows about it could help.

What are you doing it with A plugin or scripts?

What exactly do you mean?

I change the item motion using command blocks. The world itself should then be 100% single player possible. So plugins probably not. But n Datapack or Resourcepack would work. But I don't know how to change that, if you can at all

Oh okay, then I'm sorry I can't help you any further.

But you can create a local Minecraft server that is only accessible to you, so you can do a lot on it.

So yes, I actually have a multiplayer server, I also have a few Please on it, but no Please that add new features or something. Because I wanted to publish the map later and that's why everything should ideally broadcast in single player.