To me, without knowing the full details of the case…This sounds like a case where I’d imagine this rule exists, but it’s generally not enforced, or at least it’s enforced with leniency. My guess is that is that either a) this was a special case where extraordinary factors delayed the arrival of athletes (because it’s weird that athletes from three separate countries were late), and Ukraine played the technicality card, or b) athletes from various NPCs have been arriving late to the call room for various competitions without recourse, until Ukraine decided to play a technicality in their favor (which is a fair move, but perhaps a unpopular move amongst the para athletics community)
I hope World Para Athletics release a statement explaining the details of the case at some point…