It is not operational.
It probably has limitations we are not told about.
If the other side believes they can be seen through clouds, all the time, it complicates their life considerably.
If the other side doesn't know it can be seen through the clouds they will continue to expose their activities on cloudy days. And we would be watching.
Now they know they can be seen and will innovate new ways to avoid detection.
Revealing this is not a plus.