Does anyone have a list or recommendations where the story is like only 6 chapters long bu...

Karasuogaoka dont be shy

Here my list
https://www.mangago.me/home/mangalist/664884/
Not all of them are smut so you can check the tags to see which ones are
Also here some short length webtoons
https://www.mangago.me/home/mangalist/705234/
Same thing with the first list... Check the tags to find the smut ones
Hope I helped

Maybe this?
https://www.mangago.me/read-manga/baby_sugar_succubus/

Thaaaaaank youuuuuuuu(▰˘◡˘▰)

https://www.mangago.me/home/mangalist/1103037/

https://www.mangago.me/home/mangalist/1103164/

https://www.mangago.me/home/mangalist/1120188/