Why is the “build” tab missing within Qt Creator application?

[DaShubWubDub]

https://i.postimg.cc/qM7n6Zkx/22471318-4765-4491-93-F6-4-D285-F2-B8669.png

My ultimate goal is to change the directory where the executeable(s) are stored, the build directory.

[Chris Kawa]

It's not missing. There is no such tab.
You build your project by clicking on the hammer icon in the lower left corner.

To change your build directory go to the Projects tab. In the left panel select the Build entry under the kit you're using and then in the properties panel on the right you'll see project settings including the build directory. You can change it there separately for Release and Debug configurations.