Not sure what you want to do with that. You can modify it with debug mode and edit form view. Here I could show you how I have modify mine:

<record id="purchase_order_tree" model="ir.ui.view">
    <field name="name">purchase.order.tree</field>
    <field name="model">purchase.order</field>
    <field name="arch" type="xml">
        <tree decoration-bf="message_unread==True" decoration-muted="state=='cancel'" decoration-info="state in ('wait','confirmed')" string="Purchase Order">
            <field name="message_unread" invisible="1"/>
            <field name="name" string="Reference"/>
            <field name="date_order" widget="date"/>
            <field name="partner_id"/>
            <field name="company_id" groups="base.group_multi_company" options="{'no_create': True}"/>
            <field name="date_planned" invisible="context.get('quotation_only', False)" widget="date"/>
            <field name="origin"/>
            <field name="amount_untaxed" sum="Total Untaxed amount" string="Untaxed" widget="monetary" invisible="1"/>
            <field name="amount_total" sum="Total amount" widget="monetary"/>
            <field name="currency_id" invisible="1"/>
            <field name="state"/>
            <field name="invoice_status" invisible="not context.get('show_purchase', False)"/>
        </tree>
    </field>
</record>

As you can see, I switched those two datetime to date only and hide a column, for a clear display. You may also like to add a column as you like to display on the View. Perhaps you could share more information of HOW you wanna see.

Hi,

To replace the above tree view , what you have to do is that, just change the id of the record with module_name.original_id . Then you can make the necessary changes inside the record. You can change the order of field etc....

<record id="module_name.purchase_order_tree" model="ir.ui.view">
    <field name="name">purchase.order.tree</field>
    <field name="model">purchase.order</field>
    <field name="arch" type="xml">
        <tree decoration-bf="message_unread==True" decoration-muted="state=='cancel'" decoration-info="state in ('wait','confirmed')" string="Purchase Order">
            <field name="message_unread" invisible="1"/>
            <field name="name" string="Reference"/>
            <field name="date_order" />
            <field name="partner_id"/>
            <field name="company_id" groups="base.group_multi_company" options="{'no_create': True}"/>
            <field name="date_planned" invisible="context.get('quotation_only', False)"/>
            <field name="origin"/>
            <field name="amount_untaxed" sum="Total Untaxed amount" string="Untaxed" widget="monetary"/>
            <field name="amount_total" sum="Total amount" widget="monetary"/>
            <field name="currency_id" invisible="1"/>
            <field name="state"/>
            <field name="invoice_status" invisible="not context.get('show_purchase', False)"/>
        </tree>
    </field>
</record>

Thanks