It’s a good chance that Cubase 10.0.40 will be released on the same day as Nuendo 10.2 (just as C10.0.30 was released on the same day as N10.1 - both June 26).
The Nuendo 10.2 update was confirmed as late as today in the Nuendo forum that it will be released first week of September, i.e. next week.
It was delayed due to issues found at the testing phase.
So, next week is quite likely for the Cubase update too.