Hello, Sushant 

You can inherit stock inventory line form view as below mentioned code

<record id="stock_inventory_line_inherit" model="ir.ui.view">

            <field name="name">stock.inventory.line.form.inherit</field>

            <field name="model">stock.inventory.line</field>

            <field name="inherit_id" ref="stock.view_inventory_line_form"/>

            <field name="arch" type="xml">

             <field name='product_uom' position="replace">

              <field name="product_uom" groups="product.group_uom" readonly='1'/>

              <field>

            </field>

        </record>

Thanks

Anisha Bahukhandi

Technical Content Writer