No they didn't, they sent a conventional signal that was encrypted with an entangled particle. Nothing was sent ftl, this is like if I had two boxes that I know have the same thing in them, an encryption key, and traveled across the world, and sent you a message, you have the other box, the information in that box didn't go ftl you just opened it later.

there is no path to ftl communication here.

have a basic video on the topic: https://www.youtube.com/watch?v=9oBiS_Yb9Ac