What's funny is... Black Panther is a 70+ year-old Marvel IP
and T'Challa been
the Black Panther for 98% of the stories
i.e. in the past 30 years you'll get 4 issues about his daddy... with the other 300+ issues worth of solo series, avenger appearances, what-if stories, summer events, etc featuring... guess who? (hint: it's not Shuri).
aka nobody gave a fukk about his daddy, grand daddy or great great grandmama wearing the "mantle" nor made stories. They were just teritary background characters whenever T'Challa needed to chastize or be chastized by his dead relatives. Anybody who actually follows the lore knows this.
The "mantle" is just some weird shyt the white folks at Disney been on ever since Chad died without disclosing his medical condition.