dv said:

In 2016, 30.1% said they had no religion.
In 2021, it was 38.9%.
So it will interesting to see how that’s going.

I think it will up. Mainly because of the older generations dying off ¹, and those have been the most likely to indicate affiliation to organised religion in previous census data.

¹ sorry if that is a crude way to put it.