Tip on using StreetComplete: Don't be afraid to turn off a bunch of things. If you leave everything on you'll often find yourself standing around one place instead of enjoying more of the area and answering a smaller set of questions.
It's kind of a malicious compliance thing. The new name will not show up on any map renders, moreover it's not likely to be shown in most apps even if you select the object (because official_name:* is not supported by most apps).