They do have tamper evident packaging but it is only limited to high value but small size item. But the size of bag should fit for the phone.
If you order ram costing upwards of 10K, usually it is delivered in tamper evident packaging. The outer bag has a serial number which is communicated to the customer through email and app. You need to provide OTP while receiving such packages.
From my point of view, these type of incidents are very less. Also, this helps them weed out delivery boys and customers who are not suitable for their platform. In most of the cases, the customer and delivery boy collude to execute something like this. From the video itself, I do not see the customer opening a seal of the box or something. He opened it from side which was odd.