MavenCentral has it https://search.maven.org/artifact/org.jetbrains.dokka/dokka-gradle-plugin/1.4.30/jar

This is different module... Not a gradle plugin. Gradle plugin should be named

org.jetbrains.dokka.gradle.plugin

and exist at https://search.maven.org/artifact/org.jetbrains.dokka/org.jetbrains.dokka.gradle.plugin/1.4.30/jar

Not sure why these both exist, we use the one I linked, and that’s what’s mentioned in the Dokka documentation as well https://kotlin.github.io/dokka/1.4.30/user_guide/gradle/usage/