@alex somebody on our support email email@example.com can try and help out. It sounds like you’re already in a conversation thread with them.
For now, running these commands will disable the discrete GPU (Nvidia) for graphics, falling back to the integrated graphics (Intel). That should reduce the temperature, and allow the fan to run quieter.
sudo rm /usr/share/X11/xorg.conf.d/11-nvidia-prime.conf
sudo systemctl disable gpu-manager.service