During the Final step of the UTF-8 migration package the source system (21.0 or lower) should be stopped when the final step SQL statements are run.
If a QUEUE object is currently set to stopped, will it stay stopped on the target (UTF8) system? What about if it's currently started or in GO status on the source system? Will it stay in that status on the target?
Anything that is currently running in the source system or in a GO status will stay in that status on the target system. Anything that was stopped on the source system will remain in that status on the target system. This is because the FINAL part of the pack will take any records that were not already moved and row by row it will transfer these to the target database.