You can check for updates and install them by following the steps in the following link. https://www.samsung.com/us/support/answer/ANS00077582/
If the device is showing that it is up to date then the device is updated available for your device.
Let me know if this helped!
The same as any other phone. Unlocked ones usually update last, I know from experience... With the pandemic in the world, updating phones is taking longer due to people not working. Be patient.