What am I allowed to check for the race and ethnicity boxes on my app based on my 23 and me?

Nope. It’s a historical holdover from some misguided German folks. Aryan has similar origins.

MODERATOR’S NOTE:
This appears to be a hit-and-run posting. The OP has never returned. When the conversation shifts to the etymology od Caucasian, there is nothing original left to say. Closing thread.