And just because they have that capability, doesn't mean they can "legally" use it. The posted article says that it can do a better resolution than that 50cm, but didn't specify how much better.
ICEYE's website says high res (25cm) imaging is commercially available. Even has some sample 25cm res images available for download at the bottom of this page (I have not downloaded so can't vouch for it) https://www.iceye.com/satellite-data/blog/new-benchmark-in-i...