Hello Lalips,

1 - Within your module, you can create [name_module/security/name_module_groups.xml]

<odoo>
    <data noupdate="1">
        <record id="group_manager" model="res.groups">
            <field name="name">Manager</field>
            <field name="comment">This User Is Manager.</field>
        </record>
    </data>
</odoo>     

2 - Now you can use this group in buttons and fields to make them visible only to the manager, using groups="name_module.group_manager" Note: Replace "name_module" with the actual name of the module where group_manager was created.

<button name="funcition_aprove" string="Approve type="object" groups="name_module.group_manager"/>