what ik is some of manhwa actually originally from light novel unless they're og webtoon then there's no light novel. some of the famous manhwa that have light novel is..,
1.orv
2.tbate
3.solo leveling
4.return of mount hua sect
5.totcf (and many more)
you can obtain light novel from physical shop but idk if in another country but it possible to buy them in korea. you can read them online too in any website. people usually be impatient with manhwa lol bc of the hiatus and etc so we will read light novel instead. the flow and plot is the same for both manhwa and light novel but usually the novel is more details.
im sorry if this not helping but that's some things that ik bout light novel.
I've been hearing about light novels. Can someone tell me about them and how to obtain them?