Why do the maven repos have scala 3 version of "core" but not "ext-scalatags"?

[abrighton]

There is a Scala 3 version available for scalacss "core". See here.

but for "ext-scalatags", there is only: this scala 2.13 version.

Since they are in the same source tree, I would have assumed they would both have Scala 3 versions.