For the Maxwell (NV110/GMXXX) series and newer, install the nvidia package (for use with the linux kernel) or nvidia-lts (for use with the linux-lts kernel) package.
Here are some settings for Wayland support:
echo "options nvidia_drm modeset=1" > /etc/modprobe.d/nvidia-drm-modeset.conf
echo "options nvidia NVreg_PreserveVideoMemoryAllocations=1 NVreg_TemporaryFilePath=/tmp" > /etc/modprobe.d/nvidia-power-management.conf
Install dependencies:
sudo pacman -Sy usbutils cups sane imagescan
Enable CUPS service:
sudo systemctl enable --now cups.service
Install epson-inkjet-printer-escpr from AUR
Now you can try to see if sane recognizes your scanner.
scanimage -L