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They are not EU region locked.
https://projectpokemon.org/home/files/file/3836-eclipse-shiny-lunala/ US & EU
https://projectpokemon.org/home/files/file/3964-lunar-eclipse-shiny-lunala/ JP
https://projectpokemon.org/home/files/file/3887-eclipse-shiny-lunala/ Korean
Once you complete the DLC, you can take another Kubfu to the tower you selected with your save and evolve it. Including untrained ones.
I had Kubfu cloned by someone else since I'm vanilla, and never touched the spare. Thought I'd go into the tower anyways and see if its possible to evolve more...
HoeenHero wanted to know so I tested a couple things in game.
Neutralizing Gas on the Field, Neutralizing Gas gets switched in. NeutGas activates on entry.
NeutGas suppressed by Gastro Acid. Switched in a Corvi with Pressure. Pressure activated: Gastro Acid suppresses NeutGas successfully...