Of course they pose a national security risk. Imagine your government officials walking around with devices fully capable of recording bodily activities, location, sound, video, and transmit it to a foreign power, with or without the wearer's knowledge. 🤯
Then add the ability of third party powers to use Israel's NSO spying capabilities for these devices.
The moment I could replace these devices with my own home-grown ones, I would. If anything, it's surprising it took them this long. Maybe they thought they had enough control over Apple.