It is definitely an idea that I’ve considered. Multiple maps for a single quest would require significant changes to the database and code. But more important than the changes, it adds a level of complexity to quest creation and game flow that could create confusion. For example, if it is done on one map, what happens on others.
As a work around, put a badge on the quest (or chain) and then use that as a lock on other quests. Students would need to find where that badge can be earned.
I’ll see about adding the ability to format text in the custom lock message and you could include a link to the quest where the badge can be earned in the message. That way the quest with the badge wouldn’t even need to be on a map, but could be a prerequisite to any quest.