The mandate for Polymarket resolutions is very clear: a market resolves based on conditions within its own defined timeframe, not by a later event; you can't just move the goalposts after the match is over, and this is a basic compliance rule.
The approval for a 'No outcome' on June 19-20 happens because nothing occurred on those dates, regardless of any military action on June 21st.
Thinking a later strike triggers an earlier resolution completely misunderstands jurisdiction and event-specific conditions, like saying a speeding ticket from last Tuesday is valid only if I get another one this Friday.
Each market has its own strict permitted window for an event to happen.