It’s not a dumb question, but it’s not going to work. The APIs are really different:

• https://docs.kbin.pub/#introduction
• https://join-lemmy.org/api/classes/LemmyHttp.html

Although kbin and lemmy mostly share a federation protocol, they’re different applications with different client-access APIs, apps for one definitely won’t work with the other. I believe the only app for kbin is https://github.com/ernestwisniewski/kbin-mobile.