Although Samsung and NextRadio announced earlier this year that all upcoming handsets of the South Korean brand to hit the US and Canada will feature FM radio support, the Galaxy S9 and S9+ came with a bug that disabled it. Now, Samsung has just confirmed that a fix for this problem is on the way, but only mentioned "in the next update" instead of an accurate date.
https://www.notebookcheck.net/FM-radio-support-coming-soon-to-the-Samsung-Galaxy-S9-and-S9.293640.0.html