a general or for you channel. i feel restricted by channels sometimes because my cast doesnt really fit anywhere, and if i post in home no one will see it.

This is not true. If you cast outside of a channel, it just goes to your followers.

Casting in a channel gives it the potential to be seen by more people.

Maybe because after the channels update most of the channel on default mood . And his ACC is still small in terms of following so he didn't rank up to ppl to see ? Idk but maybe that's the case