Mirrored displays, not extended

[Mr_Susan]

Hi

I'm using my MacBook Air M1 (13.3 (22E252)) connected to a Dell WD19 dock (latest drivers installed).

I've got a Dell P2219H monitor connected to the dock via a USB C to Diplayport cable and a Dell S3422DW monitor connected to the dock via a Displayport to HDMI cable.

DisplayLink Manager 1.8.1 is installed.

The Dell P2219H is running fine at 1920x1080 @ 60Hz

The Dell S3422DW is mirroring the P2219H.

I've attached the output from DisplayLink Information.

Is there anything I can do to extend the displays rather than mirror?