One point I'd make from an earlier thread on the topic -- it sounds like RAAC panels were used in a number of countries. It may be that the UK is particularly affected due to having quite a bit of rain -- it's moisture that does the damage.
But it may also be that the UK is being relatively-proactive. Almost all the articles I see talking about this are in the UK. I wasn't able to find articles elsewhere saying "yeah, we looked into this, but it's not an issue in our country because X".
We don't use it much in the US, but it looks like there is at least some out there, and I haven't seen articles here saying "yeah, this is what the Brits are worried about, and we identified the buildings where it was present here and have determined that it's not a problem".
And use of the stuff is apparently common in mainland Europe, and I see no (English-language) news articles on it there.
So it may well be that the British response -- whether it should have been faster or not -- is, in fact, the response that's actually moving the most-quickly.