Second HDMI port on Raspi4

Volumio Information

Volumio Version: latest
Hardware: Raspi4
DAC: Internal

The Raspi4 has two HDMI ports. Volumio has only one HDMI selector and uses only the first HDMI port. Are there plans to support the second one? I like to hook it up to two devices without switching cables. An Audio only mode for the second port would be a nice feature too.

or use a splitter