The IBF never ordered the mandatory. GGG is the one who sought out a fight with Szeremeta because it's an easy payday and DAZN will pay him millions for it. It's a cherrypick, no different than bud opting to fight mean machine when he didn't have to fulfill his mandatory yet.
Canelo would never, he's going to face another champion in his next fight
if i were you i would learn the difference between mandatory and voluntary