visas: after the UKVI email, how long does it take UPS to send the package?

My wife and I applied for the standard UK visitor visa and received the email notification entitled "Your UK visa application has been sent: XXX" on 28/11 last week.

We check the status of the return label in UPS every day, but it remains "Label created" after 9 days. We sent an email to UKVI and they said they would scale and ask several questions 3 days ago. But no change since then.

How much time does the shipment usually spend after notification by email?