you should join batato discord and ask this question, many uploaders will help you solve this probably.
i ask some question about mangago before and one mod told me to refrain from talking about other sites other than asking about b@to so i wouldn't want to risk it again lmaoo
i havent tried uploading placeholders yet, but since your chapters dont auto approve and have to be approved manually, i'd recommend u to wait. after i uploaded around 40-50 chapters, mangago started letting me upload chaps without there being an approval period. like i can just upload one & itll publish right away. so the other uploaders probably have that option, and so can upload as many placeholders as they want.
how do uploaders put multiple Placeholders on mangas and got approved for it? i put 3 placeholders for 1 manga and it went on more than 3 days in crickets, abandoned and not even got approved while my uploaded chapters got approved in 3-5 hours at the same time. so how exactly do i stop bot from snatching chapters from other sites then smh
i sent email to the site owner as well but it’s still crickets idek anymore.