knowledge/document_page_approval/security/document_page_security.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <record id="group_document_approver_user" model="res.groups">
        <field name="name">Approver</field>
        <field name="category_id" ref="knowledge.module_category_knowledge" />
        <field
            name="implied_ids"
            eval="[(4, ref('document_page.group_document_editor'))]"
        />
    </record>
    <record id="document_page.group_document_manager" model="res.groups">
        <field name="implied_ids" eval="[(4, ref('group_document_approver_user'))]" />
    </record>
    <record model="ir.rule" id="rule_change_request_global">
        <field name="name">Change Request Global</field>
        <field name="model_id" ref="model_document_page_history" />
        <field name="groups" eval="[(6, 0, [ref('knowledge.group_document_user')])]" />
        <field
            name="domain_force"
        >['|',('state','=','approved'),('create_uid','=',user.id)]</field>
        <field name="perm_read" eval="True" />
        <field name="perm_write" eval="True" />
        <field name="perm_unlink" eval="True" />
        <field name="perm_create" eval="True" />
    </record>
    <record model="ir.rule" id="rule_change_request_approver">
        <field name="name">Change Request Approver</field>
        <field name="model_id" ref="model_document_page_history" />
        <field name="groups" eval="[(6, 0, [ref('group_document_approver_user')])]" />
        <field name="domain_force">[('state','!=','draft')]</field>
        <field name="perm_read" eval="True" />
        <field name="perm_write" eval="True" />
        <field name="perm_unlink" eval="True" />
        <field name="perm_create" eval="True" />
    </record>
</odoo>