Hello,
I had the kali linux 2020.3 version which worked with 3 screens and when I upgraded to the kali 2020.4 version
I only have one screen connected, the other two appear disconnected from the system.
I am looking for a charitable soul who can help me.
Thank you very much.
Below the info :

xrandr

Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 16384 x 16384
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 connected primary 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
1280x1024 60.02*+ 75.02
1152x864 75.00
1024x768 85.00 75.03 70.07 60.00
832x624 74.55
800x600 85.06 72.19 75.00 60.32 56.25
640x480 85.01 75.00 72.81 66.67 59.94
720x400 70.08

xrandr --listmonitors
Monitors: 1
0: +*HDMI-3 1280/376x1024/301+0+0 HDMI-3