Samsung pushing out a new software update to the unlocked Galaxy S8 and S8+ smartphones in the US. The software version of this update is G950U1UES7DSK4 and G955U1UES7DSK4 for the Galaxy S8 and S8+ respectively. The size is 72MB and the update includes November 2019 security patch.
You can check for the update by heading into the Settings > Software update.