manufacture/mrp_subcontracting_purchase/demo/product_supplierinfo_demo.xml

<?xml version='1.0' encoding='utf-8' ?>
<odoo>
    <record id="product_supplierinfo_subcontract_1" model="product.supplierinfo">
        <field
            name="product_tmpl_id"
            ref="demo_product_product_finished_product_template"
        />
        <field name="price">10</field>
        <field name="name" ref="res_partner_subcontracting_1" />
        <field name="currency_id" ref="base.USD" />
    </record>

    <record id="product_supplierinfo_subcontract_2" model="product.supplierinfo">
        <field
            name="product_tmpl_id"
            ref="demo_product_product_component_product_template"
        />
        <field name="price">10</field>
        <field name="name" ref="res_partner_subcontracting_2" />
        <field name="currency_id" ref="base.USD" />
    </record>

    <record id="product_supplierinfo_subcontract_3" model="product.supplierinfo">
        <field
            name="product_tmpl_id"
            ref="demo_product_product_element_product_template"
        />
        <field name="price">10</field>
        <field name="name" ref="res_partner_subcontracting_vendor" />
        <field name="currency_id" ref="base.USD" />
    </record>
</odoo>