Sorry to mislead. Following the link in post #7 led to UDX but I was unable to find similar specs on UCX, and knowing how such things are inconsistent, was left with inadequate information.Maybe F6 is disabled, try also CTRL+ALT+F3 and CTRL+ALT+F4, or try every one from F1 to F12 while pressing CTRL+ALT
If it's still not working what could make it work is booting in recovery mode and try again, but your boot menu doesn't have this option.
It's not typo, his laptop model is UCX not UC.
Anyway your nouveau link doesn't explicitly list RTX 2050 either.
It's not clear to me what the current state of affairs with the machine is, what all the things that have been tried and what succeeded or failed. Hence, some questions for @Ali711:
What is on the drive on the machine?
Is there an existing installation on it?
Have all attempts at installing a distro on this machine, other than Kali mentioned in post #1, failed?
When Kali was tried and succeeded, was there a GUI login that succeeded?
If all subsequent attempts at installation have failed with an installation usb stick that is known to be good, then an alternative approach may be necessary.
In the case where nothing can install, it may be possible to boot up a live disk, or a rescue disk such as systemrescue, and do some work. Since a live disk or rescue disk can work totally in RAM, it can gather information about the computer such as its graphics card, the drive etc., and can also be used to wipe the disk clean so that no left-over software on it can interfere with a new installation. The health of the computer's drive can also be tested from a live disk or rescue disk.
If after cleaning the disk, installation still fails, then it's likely the drive is the problem.
The details of how all the work can be accomplished can be outlined in detail, but first readers would be best informed of the actual latest situation.

