It's a bit of a stretch to say those Polymarket outcomes for the 19th and 20th were triggered by something that happened two days later, on the 21st.
If something hasn't happened by its deadline, then it hasn't happened, full stop; the later event is just irrelevant to that specific condition.
That market would have resolved 'No' anyway because the mandated action simply didn't occur on those days.
It’s like saying my bus was late today because it broke down tomorrow; you need to look at the fail-safe conditions in play at the time.
The market's rule was simple: if no strike by X date, it's 'No'.