RTMS error 2310 despite active Zoom Developer Pack

I read this RTMS on Sub Account

  • We have a developer pack on our main account. Do I need to enable developer pack on all sub-accounts which will use RTMS feature, or will they share/use main account developer pack ?
  • also, enabling rtms will I get transcript of all spoken audio by all participants in meeting or only the user with Rtms user managed app?
  • can I not install centrally on parent account using Admin Managed Apps ?