All players have no permissions. Including the OP。
The plug-in version：LuckPerms-Sponge-4.3.9.jar
SPONGE Server version：SPONGE1.12.2-2705-7.1.0-BETA-3361

Is that what you're talking about。
I wonder if I misunderstood you

I found the position you mentioned, and I will try it immediately. I'm very sorry to disturb you

OP gets disabled by Sponge as soon as there’s a permission plugin.

And well, you need to add permissions. By default no one has any permissions.

Basic usage can be found on the wiki on the Usage page.

I am really sorry, but I did not see how to solve this problem after I visited the wiki twice. Could you please give me some advice? I'm very sorry

As I said. OPs are entirely obsolete. And that’s intended and good. Also no way around it.

And the commands to add permissions are explained beginner friendly on the Usage page (the wiki has a navigation on the right (or bottom on mobile) and there is a link called “Usage”). That’s the page you want to get started on.