For now, I'm assuming they will. I pinged the team in the #compose-web channel so hopefully we'll confirm by next week.
Otherwise, I left this comment on Reddit yesterday: https://www.reddit.com/r/Kotlin/comments/12kauzh/jetbrains_compose_is_now_compose_multiplatform/jg48twa and I haven't changed my opinion yet.
There's a chance this can push Kobweb up from a nice to have library to a must have framework for this space, since I've been spending a bunch of time filling in API gaps the JB team has so far not attempted to finish, and maybe now they're signaling they may not do so for a lot longer.
Interesting times!