data-protection/privacy_personal_data/views/privacy_activity_view.xml

<?xml version="1.0" encoding="utf-8"?>
<data>

  <record model="ir.ui.view" id="activity_form_inherit_personal_data">
      <field name="name">Privacy Activity Form Personal Data</field>
      <field name="model">privacy.activity</field>
      <field name="inherit_id" ref="privacy.activity_form"/>
      <field name="arch" type="xml">
        <xpath expr="//group[@name='subjects']" position="inside">
            <field name="subjects_categ_ids" widget="many2many_tags" string="Category"/>
            <field name="legal_ids" widget="many2many_tags" string="Legal"/>
            <label for="personal_data_ids" string="Tracked data"/>
            <field name="personal_data_ids" nolabel="1"/>

        </xpath>

        <xpath expr="//group[@name='basic']" position="after">
          <group name="controller_details" colspan="4">
            <field name="controller_ids"/>
          </group>
          <group name="objective_details" colspan="4">
              <field name="define_objective" string="Define Objective(s)"/>
              <field name="objective_ids" attrs='{"invisible": [("define_objective", "=", False)]}'>
                                <tree name="objective">
                                  <field name="name"/>
                                  <field name="description"/>
                                </tree>
                              </field>
                            </group>
          </xpath>
          <xpath expr="//group[@name='subjects']" position="after">
          <field name="has_sensitive" invisible="1"/>
          <group colspan="4" attrs='{"invisible": [("has_sensitive", "=", False)]}'>
          <div class="alert alert-warning" role="alert" style="margin-bottom:0px;">
                    This activity has sensitive data.
                </div>
              </group>
          </xpath>
	  <!--<xpath expr="//tree[@name='processors']/field[@name='country_id']" position="after">
            <field name="internal"/>
	  </xpath>-->
        </field>
    </record>

</data>