Wait, so if that silver that Udyu shot into Yhwach stopped his powers from working, his powers of seeing the future and being able to change it, wouldn't be able to see that part, since his "Almighty" powers wouldn't be active then. And if that's the case then wouldn't his powers just be able to see an ending that he benefits from because it wouldn't be able to know that he would get shot, since he got shot by the silver from Udyu.
Doesn't really make up for the ending we got, but just something cool that I just thought about and wanted to share. It's been a while since I last read the ending, so I don't know all the exact details like whether or not he saw Udyu shoot it or not, but if I'm wrong just point it out and I'll look it up.