Even if they knew, what would they do about it? It's not like "the governments" could pull up a Spectre patch out of thin air. There are no mitigations. So what do they gain from knowing if they can't avoid it anyways?
As a simple analogy, look at how the Kia lock vulnerabilities are being handled. Yes, it’s best if you can repair everything but it’s not without value to make sure everyone affected knows the risk so they can change their behavior or buy a separate lock until then.
They can use different applications and communication channels to avoid leaking data to hostile governments.
What about, everybody stops using the defective software? Or, more conservatively, all EU governments stop using the affected products?
Call meetings. Join endless meetings. Make deadlines for more meetings.