Can Raspi 4 Dual HDMI be configured to duplicate outputs?

I am setting up a display kiosk with back to back LCD Displays. Currently I use a raspi 3B+ with an HDMI splitter to duplicate the displays, however the splitter is another point of failure and requires an extra PSU.

The raspi 4 looks perfect however I can’t seem to categorically see detail on setting that HDMI 2 is a duplicate of HDMI 1. Can someone confirm that this is possible?

Hey @Mart,

Take a look at this thread. It seems there is a simple and easy solution.

I hope this helps.