There were reason to believe they were less subject to US juridiction: their Subscriber Agreement is for "Sectigo Limited, a limited company formed under the laws of England and Wales". See https://www.sectigo.com/uploads/backgrounds/Certificate-Subs...

Sadly, their United Terms and Conditions in section 8.2 are even more restrictive than LE's. They reject any entity "located in, incorporated under the laws of, or owned (meaning 50% or greater ownership interest) or otherwise, directly or indirectly, controlled by, or acting on behalf of, a person located in, residing in, or organized under the laws of any country sanctioned under the laws of the U.S. or E.U." See https://www.sectigo.com/uploads/backgrounds/United-Terms-and...

From a layman point of view, it could even mean that the ICC and the UN are prohibited from using Sectigo. The Customer must have no "affiliates, officers, directors, or employees" that are on sanction lists, and the US have sanctioned some high-profile members of the UN and the ICC that spoke about the genocide in Gaza.