You're right !... The wheel's "arms" are stupidly too shorts, so the wheel looks as a 18' one! The 19' Tempest wheel, with it's longer arms, looks much better. This Cardenio's design choice is one of the worst Tesla did... Unfortunately the special dimensions of the 2021 Model S wheels don't give us another choice (at this time).
In any case, some pictures of an entire deep blue Model S Plaid without the 19' wheels caps will be appreciated a lot by many of us, naturally other colors of cars are welcome too