Well for me (linux, blender3.2.1) adding a texture node and loading one image (usually image.1001...) adds the different udims… (image.1001, image1002, image.1010..... or whatever; doesn’t have to be directly connected) to the UV editor and i don’t have to setup anything else…
Therw is a UDIM detectiong on the Blender File View/load window on the right (the cogwheel icon)…