Third display not showing in System Preferences

[ICyrets]

My model is Dell D6000, Macbook Pro M1 Pro, MacOS 15.0, my setup is triple monitor. The Dock is plugged into the type C port of the Macbook.

My external display setup includes three monitors:

Main display (LC27G5xT, 2K144): connected directly to the MacBook (via USB-C to DisplayPort)

Second display (DELL U2515H, 2K60): connected to the Dell D6000 dock via DisplayPort

Third display (1080p60): connected to the Dell D6000 dock via HDMI

I'm using the latest DisplayLink Manager for macOS, and all three monitors show an image.

However, the third monitor (HDMI via the dock) appears zoomed in and is in very low resolution, in DisplayLink Manager it is named as “No monitor”, and it does not show up in System Preferences → Displays, so I can’t arrange or adjust resolution for it.

Has anyone run into this issue or found a workaround to make macOS properly detect and manage the third monitor via DisplayLink?

Thank you.