Hello, I have an idea for your plugin. I think it will be good if we can separate the plugins in world...

We have considered it, and it has been deemed out of scope of mv.

The alternative solutions are:

1. Good plugins do have config options to disable features on certain worlds, or make them permission-based (see point 2)
2. With a permission plugin like luckperms, you can set permissions per world with its context feature, which can in most cases effectively make command/actions by plugin be per world.
3. If you have a sufficiently large server, use bungeecord to link multiple servers together where each of these servers can have different plugins and worlds.