Don't F With Cats, Luka Credit Only On Episodes

Hello hello, why does IMDb seem to only put living or acted cast credits on a Series' main page, then for example, a person who appeared as Self-ArchivalFootage in *all episodes*, their credit only is listed *within each Episode's page(s)*?? This is re [link=nm5506232]  https://www.imdb.com/name/nm5506232/?ref_=tt_rv_t3 aka Luka Rocco Magnotta aka Rocco Luka Magnotta (aka K Trammel harhar), who appears in all 3 [link=tt11318602] Don't F**k With Cats https://www.imdb.com/title/tt11318602/reference  ep's but isn't credited on the Main/Series Page. Similar question why [link=nm5506448] Jun Lin https://www.imdb.com/name/nm5506448/?ref_=tt_rv_t7  isn't a Main/Series Page credit? It might better honour his death and legacy were this fixed, though he did not appear in all 3 episodes.. Thanks.