The other way around is supposed to work but is currently broken.
Bear in mind that kbin.social (the first general-purpose English-language Kbin instance) was created in... May 2023. Our Benevolent God Ernest has only been working on Kbin seriously since January 2023.
When I joined in June, it was mostly Ernest talking to himself, with a few other randos from Lemmy who were curious about this not-Lemmy thing. A couple weeks before I joined, Ernest was in here completely alone. Getting 100k people randomly show up a month after he released the first public alpha wasn't exactly in the cards, I don't think - so he's been putting out fires that come with "oh shit my little toy project now has thousands of people using it overnight".