[Python] my Odoo is deferenct. he is not showing Send message, Log note, Schedule activity

I'm starting to study Odoo, but I'm facing problem, my odoo is not equal to the teacher's in my is not showing the sidebar Send message, Log note, Schedule activity

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Here they are customers [2]: https://i.sstatic.net/AJSVIfL8.png

Bus is not sidebar (Send message, Log note, Schedule activity< follow) [3]: https://i.sstatic.net/win9U7LY.png

could someone help me?

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