We can't know that for sure because aside from the fact that Ancajas was struggling to catch the required weight, his trainings were originally made for Ioka and the team was studying the Japanese boxer's move for quite some time to help Ancajas win the fight but that didn't happen because of Ioka's sudden decision.
Yes, we can't be sure about the result but if that fight against Ioka happened, it might be hard for Ancajas to do exactly the strategy they formed against Ioka since he's not in his usual condition which his camp also admits. It's really stressful for the body to undergo force and rush training and works on his diet of maintaining weight especially if the weigh-in is now approaching.
Not sure though why Ioka backed out, does anybody here know why?
The response above is correct. It's because of the Omicron variant that hits Japan late last year. Since the venue will be in Japan, it got delayed. Also, the same case happened with GGG vs Murata fight that is postponed due to the virus as they also held their fight in Japan.
Ancajas unification fight vs Ioka in Japan postponed to 2022 due to Omicron
Well, you guys might be right about that and Ancajas will struggle because of his situation at that time and might be defeated if in case his fight against Ioka were not postponed. Because of that, it'll be exciting to see them fight if Ancajas will succeed this time in grabbing the IBF back in his possession as Ioka is now holding the WBO belt.