I would if it appeared in the list, as my screen shot shows it does not appear.
It's either an IT problem, i.e. the RTW tool does not work in the Firefox browser on my Windows 11 laptop, or OW don't want me buying a ticket!
I've also always had issues with the tool on Firefox, it just doesn't show most airports (icl Oslo), but does show some, and which oes it does and doesn't show seems random. But it works fine with chrome, and seemingly on other browsers too.