As NET 2021 haven't been conducted yet, till now the PhD admission haven't started but soon it can be expected that the PhD admission will be out. So you should wait for some time. The delay of NET examination is due to the covid scenario.

To know more about NET updates visit the link below:

https://competition.careers360.com/articles/csir-ugc-net

I hope this answer helps. All the very best for your future endeavors!