Even if that's the case, the tiling "primitives" (I don't know if that's the right word) for 3rd parties to leverage is there.
By the way khronkite was forked a bunch of times to create things like Bismuth which isn't supported in plasma6 anymore. Are you sure khronkite itself works? Are you using kde5 ? Or this fork https://github.com/anametologin/krohnkite ?
According to the reddit comments I've seen, there aren't any plans to expand tiling functionality much beyond what it currently is in KDE.