the publishers seem to have more interest in trying new writers and ideas and letting them sink or swim, basically. Like the same weekly magazine that publishers one piece might let your little idea get in there too, and if readers seem to like it they'll open up spots for you in the schedule, or it can die as a one shot or get cancelled after a few chapters.

Lots of new interesting stuff comes out and dies or doesn't survive, but it means they do have some constant incubation. The American version of this for comics is basically letting new writers try their hand at a big existing property to see if they're any good, but that means the new ideas are "fun spin on batman" or etc. (And of course the indie scene exists in both to different extents, but the publishers for non DC/Marvel stuff in the US are anemic.)

I hear scholastic is genuinely good, but they have a very specific audience ofc.