Hi,

Please try to use the below example for inheriting buttons.

<odoo>
<record id="product_template_form_view_sale_order_button_inherit" model="ir.ui.view">
<field name="name">product.template.sale.order.button.inherit</field>
<field name="model">product.template</field>
<field name="inherit_id" ref="sale.product_template_form_view_sale_order_button"/>
<field name="arch" type="xml">
<xpath expr="//button[@name='action_view_sales']" position="attributes">
<!-- Modify the attributes you want to change -->
<attribute name="help">Updated help text for the button</attribute>
<attribute name="icon">fa-new-icon</attribute>
</xpath>
</field>
</record>
</odoo>

Hope it helps