postmarketos-ui-xfce4: device does not show its internal partitions on the desktop

Describe your issue

What's the expected behaviour?

XFCE4 should show my internal drives on the desktop.

What's the current behaviour?

XFCE4 does not show internal drives on the desktop.

How to reproduce your issue?

Install task-xfce4-desktop from Debian and see how internal partitions are shown on the desktop.

But, install postmarketos-ui-xfce4 from pmbootstrap and I can't see automounted internal partitions on the desktop.

What device are you using?

asus-tf101

On what postmarketOS version did you encounter the issue?

• edge (master branch)
• v21.12
• v21.06 (supported until 2022-01-29)

On what environment did you encounter the issue?

Phone environments

• Phosh
• Plasma Mobile
• Sxmo (Wayland/Sway)

Other

• No environment
• GNOME
• KDE Plasma
• Kodi
• MATE
• Shelli
• Sway
• Weston
• Xfce4
• fbkeyboard
• i3wm
• Sxmo (Xorg/Dwm)

How did you get postmarketOS image?

• from https://images.postmarketos.org
• I built it using pmbootstrap
• It was preinstalled on my device

What's the build date of the image? (in yyyy-mm-dd format)

Not relevant.

Additional information

With a picture, everything can be better explained. As you can see marked with white, the device shows its internal partitions on the desktop (I installed Debian 11 for that).

However, I only get a plain screen with XFCE4 UI in PostmarketOS, where the device does not show its internal partitions:

Is this intended this way, for any reason?