I'm going through Sprint 1, and was surprised to see instructions to "use the Account Review UX" in 11.3 Check Your Build, as well as instructions to check Target Review UX and Account Review UX in 12.2, as I don't remember and can't find the instructions to build these.
Did I miss these instructions, or is it meant to be implied with this checklist? Just want to make sure I didn't somehow skip a section somewhere.