Hi,

Solution via QWeb Template Override (Best)

You need to inherit and override the template that renders the POS Mobile UI splash page. The "My Orders" button is controlled by a condition ( t-if="showOrders" or similar).

Step 1: Identify Template

Look for:

point_of_sale.splash_screen_template

or

point_of_sale.mobile_mini_splash_template

It typically looks like this:

<t t-if = "showOrders"> <a class = "btn btn-secondary" t-attf-href = "/pos/my/orders" > 
      My Orders </a>
 </t>

Step 2: Override the Template in Your Module

<odoo>
     <template id = "remove_my_orders_button"  inherit_id = "point_of_sale.splash_screen_template">
         <xpath expr = "//a[contains(@href, '/pos/my/orders')]"  position = "replace"/>
     </template>
 </odoo>

This completely removes the "My Orders" button, regardless of t-if.

If it's a different template in your Odoo version (like point_of_sale.mobile_splash_template), use that instead.

Step 3: Load This in Your Manifest

{
    ... 
    "depends" : [ "point_of_sale" ],
     "data" : [
         "views/pos_mobile_remove_my_orders.xml",
    ],
}

I hope it is usefull