System updating now, but I was able to redeem on all my Chase cards on 10/1/21 for the categories that said redeem through 9/30/21. They all showed a -1 number of days to redeem and were well within the 90 days.
Some categories now actually show an extended deadline stating 25% more points, others are just listed without showing the extended deadline and the 25% more points. Three CSRs had no idea about the program details.