In June 2020 I didn't realize Oda was going to give each of the monster trio 2-4 power ups in this arc and make it take so long.
Luffy is still the only one with internal destruction and future sight, I wouldn't put it past Oda to give Shanks some sort of "adv CoC" (not CoC coating) which only Luffy learns, considering he is the "CoC specialist" of his crew.