Depends on the shop. A lazy one will send it out how it comes from the importer, a good one will build & pdi it then re-box it. Bigger shops who send lots of stuff will be able to send in a huge box with minimal rebuilding required, smaller shops who don’t send much will probably re-box in the box it came in and need bars, pedals, front wheel, seatpost fitting as sending huge boxes tends to cost loads unless you send lots.
Edit: manufacturer’s warranty also void on many brands unless built by an authorised dealer too.