Dual US/EU citizen, I'm a United Flyer , my MP account being in the US passport name. My EU passport has a slight name difference (First and Middle names flipped but same spelling). Because of this I cannot add the EU passport as second passport in the United app as names don't exactly match.

Question is: can United manually verify my second passport and add it to my account so that for future trips (esp with EU ETIAS coming live next year) I can check-in online and not be asked for ETIAS? I know with delta for instance, when you checkin in person onetime your passport is "verified" in your account. Thanks!