Is it possible to create a menu item to display only the contents of each plan?

Actually I am not really sure what do you mean for your first question.

Basically you can able to create each of the plan under each of the menu item.

You can check my screenshot here : https://www.screencast.com/t/ndU7AE6TR

For example : If you specific set one of the plan under this "Payplans -Display Plans/Groups" menu type, it will only show this plan on the page.

Hello!
What I need to do is display content (articles) that is unique to subscribers. I need a menu item to display the articles available for the Basic plan. Another menu item to display the Plus Plan items and another Premium Plan item.

The way you guided me, it would be to display the payment screen of a certain plan and that is not what I need.

I'll try to be more precise:

The Basic plan has access to article 1
The Plus Plan has access to Articles 1 and 2
The Premium plan has access to articles 1,2 and 3

What I want is that the user can click on the '' Basic Plan '' menu item and display only the articles in the basic plan.

When the user clicks on the '' Plus '' menu item, he will see the items in the Basic plan and the Plus plan

When you click on the Premium plan you will see the articles of the basic, plus and premium plans

I do not know if you will understand, but I thank you for your attention.

Thank you

I think you can try use the menu access app to determine which plan can allow user to access those article, and those article you already created menu item for it, this should be suitable to use this menu access app.

https://stackideas.com/docs/payplans/administrators/access-control/menu-access