It's a software difference. Kbin is just made to be both reddit and Twitter. Lemmy is only made to be reddit. Basically.
Kine currently has problems with federation because of their cloudflare anti spam.
Under magazines you should get reddit like stuff and Twitter stuff under.. Whatever the other is called. You might get content from both under the comments sections, but I thought that was only reddit type content comments.
I suspect both the tankie, extreme right and left wing content is being suppressed by the slew of new content being posted now. And that shit not getting the votes it needs to be seen anymore.