I did a four-page short comic for Le Lombard (Belgian publisher), it was a contribution to a big book project in French, featuring 24 other comic artists; an "advent calendar" book for Christmas. And yes, you have to cut the page every day in December to reveal a new story. I negotiated to have mine published on CC-By and made it using only FLOSS :linux: :krita: :inkscape: .
Blog post: https://www.davidrevoy.com/article1055/new-comic-book-la-bd-de-lavent-le-lombard-publishing