Those mangas are mangas that originally posted with one chapter or two and the uploader just took down the chapter to either edit it or retranslate
it depends something they just want to "claim" one bl but they still dont have the chapters ready to upload.. mangago also takes a while to approve the uploads too
*sometimes
I'm just glad to see uploads, even without chaps, since we were in a yaoi DROUGHT after the massive piracy hunt
I've seen many new bl mangas that appearing but there is no chapters. Is t because it's from another site or not and do u guys think they will upload the chapters? ┗( T﹏T )┛