Is it actually correct to say “they’ve better plans”? It only sounds correct if “they’ve” (they have) is followed by a verb, like “they’ve _sold_ their house” o

Is it actually correct to say “they’ve better plans”? It only sounds correct if “they’ve” (they have) is followed by a verb, like “they’ve _sold_ their house” or “they’ve _tried_ their best.” I’ve never heard someone say “they’ve a Tesla” to say “they have a Tesla,” so I would assume this title is wrong for the same reason.