It was recently revealed by Roxx (Amazon’s Community Manager) that character names in Lost Ark will be tied to a whole region instead of a specific server. This would mean, for example, that there couldn’t be 2 characters with the same name in all Europe.
Roxx originally posted that names would be globally locked, but later clarified that they’d be locked per region and not globally.
Names will indeed be region locked, and not globally locked!
A possible reason for this decision could have to do with server merges. A server merge basically means joining servers as a single one, this is usually done when one or more servers have a very low population.