there is a kanban board (one board only) created with
multiple "projects" containing epics, user stories, tasks, sub-tasks, bugs
that are categorized / separated only by title
I want to migrate / copy all the JIRA objects within all the separate titles
to separate projects in JIRA from the original one kanban board.
is there an automated way to do this, or is it all manually done through
Clone & Move operations?
Welcome to the Atlassian Community!
Moving an issue is not a trivial action, you could (and usually are) changing the whole structure of the issue. It's not like moving furniture from one house to another, it's like converting a terraced house into a detached one.
There's no automation for anything but the most simple case of structural change (where two project/issue types have identical configurations)
You will need to use (bulk-)move - this can check all the configurations and take you through the most simple path for changing project and issue type without breaking anything.
You may note I did not mention boards. They are an irrelevance here, a board is just a view of a set of issues, it's not a container. The board may lose sight of the issues if you move them, and it may show you different information about them because you've had to change the data on them during the move, but the board doesn't matter for issue move.