Hi,

Try the below code

<record id="fo_visitor_kanban_view" model="ir.ui.view">
    <field name="name">fo.visitor.kanban</field>
    <field name="model">fo.visitor</field>
    <field name="arch" type="xml">
        <kanban>
            <field name="id"/>
            <field name="blacklist"  />
            <templates>
                <t t-name="kanban-box">
                    <div class="oe_kanban_global_click">
                        <div class="o_kanban_image">
                            <img t-att-src="kanban_image('fo.visitor', 'visitor_image', record.id.value)"/>
                        </div>
                        <div class="oe_kanban_details">
                            <strong>
                            <ul>
                            <li class="text-success float-right mb4" t-if="record.blacklist.raw_value"><i class="fa fa-circle" role="img" aria-label="Blacklist" title="Blacklist"></i></li>
                            <li class="text-danger float-right mb4" t-if="!record.blacklist.raw_value"><i class="fa fa-circle" role="img" aria-label="Other" title="Other"></i></li>
                            <li>Name :<field name="name"/></li>
                            <li>Phone:<field name="phone"/></li>
                            </ul>
                            </strong>
                        </div>
                    </div>
                </t>
            </templates>
        </kanban>
    </field>
</record>

​

Thanks