Are you both BT customers ? , obviously if you are not a BT customer you won’t be getting migrated to BTDV , even if you are a BT customer, the fact you are neighbours with someone who has been notified is irrelevant, migration isn’t based on postal addresses , but when you are in scope (assuming you are a BT customer ) you will be advised in advance.
Its highly unlikely that you are in scope , a migration scheduled but the notification hasn’t been sent , there is nothing stopping you however contacting BT ( again only if BT are your provider) and asking when your migration will be ….the date for all migrations to be done is by the end of Jan 2027 so plenty of time remaining before then.
