It can be really hard to find a good example, yeah. https://somepx.itch.io/ does a good license presentation in their packs - it's basically just outlining the cans and cants and the intention of the license (which is basically just 'don't share, do use in projects, do attribute credit').
The most important thing for me is just taking the blurb you've put on itch.io and saving it inside the artpack so it can 'survive' okay when isolated.