Dual Monitor Issue with WD19 Dock?

Hi,
I’m trying to connect two Dell P2422H monitors to my MacBook M4 Max using a WD19 dock, but only one monitor is detected.

I’ve tested different setups:

• Both monitors via DisplayPort
• One via DisplayPort and the other via HDMI

I know the M4 Max chip should handle multiple external displays without any issues

I also considered USB-C, but the monitors don’t have USB-C ports.

Any advice on how to get both external monitors working? Thanks!