the only belts that matter are the championship belts for the IBF, WBO, WBA and WBC. the Ring magazine also has a belt that matters somewhat but less than those other 4; although often an undisputed champ will have the Ring belt. to be undisputed in a weight class, youve gotta have all 4 belts (and optionally the Ring).
if you see stuff like the WBA Gold belt, their "regular" championship belt, the WBC franchise belt, the WBC belt they made for Fury-Ngannou - all that shit is redundant or meaningless. its just another way for belt orgs to charge sanctioning fees. the WBA has SAID theyre trying to phase out their "regular", "gold", "silver" etc belts but then Danny Dubois just won their "regular" championship belt right before he fought Usyk so who the fuck knows?
obviously, all of the various belts have become a long running joke in boxing to casual and hardcore fans.