I have RX 5700 XT, latest driver (20.1.1), and a LG Ultragear 27GL650F-B. The monitor is Freesync supported, you can check on their website: https://www.lg.com/us/monitors/lg-27gl650f-b
However, my AMD Raedon Software is not able to detect the Freesync, and I cannot turn it on on the software. I have Freesync enable on my monitor. I will attach below are screenshot so you guys can see. Thank you.