Absolutely no video output from ports

I try to figure out a problem that my laptop doesn't output any video signal. Everything works fine on windows, but when I boot to Ubuntu, I can't get my external monitor to work. At first i tought the problem was causing usb-c port itself, but same issue i get even when plugged to hdmi. I tried using integrated graphics, dedicated graphics, hybrid mode, but the outcome is still the same. None. To be precise, I have to mention, that my display has it's own usb-A ports and if i for example plug in a USB stick, I CAN access it via Ubuntu. All my cables are okey and as I said, it is working on windows.

Hardware specs:

Lenovo Legion 5 Pro
AMD Ryzen 7 with integrated AMD Radeon Graphics
NVIDIA Geforce RTX 3060
Dell P2720DC external display
(And one older Asus display to make sure there is nothing wrong with the Dell display)

Output of xrandr:

Screen 0: minimum 320 x 200, current 2560 x 1600, maximum 16384 x 16384
eDP connected primary 2560x1600+0+0 (normal left inverted right x axis y axis) 344mm x 215mm
   2560x1600     60.00*+
   1920x1200     60.00  
   1920x1080     60.00  
   1600x1200     60.00  
   1680x1050     60.00  
   1280x1024     60.00  
   1440x900      60.00  
   1280x800      60.00  
   1280x720      60.00  
   1024x768      60.00  
   800x600       60.00  
   640x480       60.00

Output of find /sys/devices -name "edid"

/sys/devices/pci0000:00/0000:00:08.1/0000:05:00.0/drm/card0/card0-eDP-1/edid

Output of lspci | grep VGA

01:00.0 VGA compatible controller: NVIDIA Corporation Device 2560 (rev a1)
05:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Device 1638 (rev c5)

I really struggle a lot to fix this problem and I can't work it out. By the way my objective is to make it work primarily on the usb-c connector, but hdmi would be good too.