You can modify the definition of the default Work Order search:

<field name="name" position="replace">
    <field name="name" string="Work Order / Component Barcode" 
           filter_domain="['|',('name', 'ilike', self),
                               ('move_raw_ids.move_line_ids.lot_id.name', 'ilike', self)]"/>
</field>

Then, scanning would find the current Work Order where the product is reserved: