Seating or a table area just like a house isn't part of the contruction budget. Do you expect a homebuilder to build your house and then buy a kitchen table for you?
Same with buying a used house. It may come with a Stove but it isn't coming with couches and tables.
The city has yet to take over official occupancy. The earliest that will happen is November 28th. Once the city and ticats have more than 12 hours to set up im sure you'll see more amenities like seating.
OSS is building this stadium. Just like Bob Young had to shell out $5 million for team area upgrades he will have to shell out for things like tables and chairs for the concessions. Im sure the couches in the endzone for the seagrams suites were purchased by the cats and weren't provided by OSS. They were purchased and installed because ppl had already paid for those suites. Nobody paid for tix to sit at a picnic table by the concessions.
Further, the cats had to buy their own office furniture for their offices as well as workout equipment. Same goes for the stadium eating area which im sure will be done over the winter/ spring.
The stadium is still a construction zone. Only the necessities to get the game going are provided.