Samsung 57" Neo G9 PBP showing as one single 4K monitor
 

Monitor: Samsung 57" Neo G9 (G95NC) in PBP mode
Computer: Macbook Air M2
Hub: Minisopuru MD6950B (also tried GiGimundo LK10 with the same issue)

Desired output: each of the monitor's HDMI input showed as a separate external monitor to be arranged in Displays configuration.

Current output: the monitor showed 2 identical 4K screen side by side. there's only one external monitor option in the Displays configuration. The DisplayLink Manager showed two displays but they are in-sync. Changing the option in one changes both.

Resolved
 

Updated the monitor's firmware to 1007 (from 1004) and everything worked.