X-Org or wayland doens't matter. My scanner works with both (verfied).
Do you have a file named 79-udev-epson.rules in /etc/udev/rules.d ?
Mine has the following content:
# chmod device EPSON group
# ACTION=="add", ATTRS{manufacturer}=="EPSON", DRIVERS=="usb",
SUBSYSTEMS=="usb", ATTRS{idVendor}=="04b8", ATTRS{idProduct}=="*", MODE="0666"
ATTRS{manufacturer}=="EPSON", DRIVERS=="usb", SUBSYSTEMS=="usb",
ATTRS{idVendor}=="04b8", ATTRS{idProduct}=="*", MODE="0777"
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https://bugs.launchpad.net/bugs/1728012
Title:
Many 3rd party scanner drivers are broken by a sane change
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