I think they have come to take it seriously, partly under pressure of the events. I think attitudes shifted with regard to the seriousness of Russian disinformation after the Russian invasion of Ukraine, although Russia has been a problematic actor in international affairs for a long time.
Similarly, I think attitudes profoundly shifted with regard to understanding China's engagement with the world in the context of the two Michaels case.
There have been shifts, but they have been recent ones, and perhaps delayed.