I think comic's process aren't as big as single Illustrations, now that I think about it. Maybe it is because the shading is more simple?
Nonetheless, here is this comic's process! After the lineart it was just adding the grays and screentones.
Google drive link: https://drive.google.com/drive/folders/1aYSOPKl3TEBE8lJCn7goxEhlIJ33heyR?usp=sharing