Ok, I opened up my Chapter 17 city on mobile and I see the tab you are referring to. The only thing I can do on that page is switch between seed production or unurium production by selecting the radio button for either one. The seeds and unurium will still be produced as normal, like a residence, and be hovering over the top of the Trader for collection when available.
I'm not sure about the wording of "constructs." It's been a while since I did that upgrade. I suspect it is just something for the storyline, that we learned how to make unurium from the Constructs race.