I think October isn't far away, and hence all your queries and concerns will be answered. In 45 days, if the applications don't open up for CSS 2021, then probably the exam is being delayed. :s

Albeit, I think they won't delay it. Reforms will probably be for the CSS 2022 exam and hopefully everything goes smooth this year. But, we'll get clarity by start of October, so fingers crossed. Although there is a public notice each year by May/June, but there hasn't been any notice of that sort this year.