rma/crm_rma_stock_location/views/product_template.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <record id="product_template_tree_view" model="ir.ui.view">
        <field name="name">product.template.tree</field>
        <field name="model">product.template</field>
        <field name="inherit_id" ref="stock.view_stock_product_template_tree"/>
        <field name="arch" type="xml">
            <field name="virtual_available" position="after">
                <field name="rma_qty_available"/>
                <field name="rma_virtual_available"/>
            </field>
        </field>
    </record>

    <record id="product_template_form_view_rma" model="ir.ui.view">
        <field name="name">product.form.view.rma</field>
        <field name="model">product.template</field>
        <field name="inherit_id" ref="product.product_template_form_view"/>
        <field name="arch" type="xml">
            <group name='inventory' position="after">
                <separator string="RMA"/>
                <group name="rma">
                    <field name="rma_qty_available" class="oe_inline"/>
                    <field name="rma_virtual_available" class="oe_inline"/>
                </group>
            </group>
        </field>
    </record>
</odoo>