Hi @Smorg and welcome. I know its awkward that a lot of folks think they're just going to hammer the "Not Kotlin" emoji and expect you to know what they mean, but there are plenty of us here willing to explain.
Basically, these rooms are primarily for questions about the Kotlin language and development, so Android or very library specific questions that are particular to a platform are encouraged to go to the Android slack chats, etc. Many of the JetBrains team lead these chats as well and they are obviously trying to focus on improving Kotlin with a lot of the conversations here so an Android Gradle or Jetpack compose specific problem kind of muddy's the chats a lot.
No one means any harm, but as one would expect, developers aren't always great at empathy or understanding the value of non-programming languages lol. I hope this helps and you have a much better time on here going forward. If you need suggestions for better places for your other topics, feel free to reach out, but many channels will have suggestions if you click the name of the channel at the top or the "Channel Overview" tab. Its not particularly obvious the way slack is, but its there.