I couldn't unlock a single what if in Goku arc. Only managed in Future Trunks after God knows how many attempts. You have to beat Raditz as Goku in like 1.40 minutes which is impossible for me.
Haven't played this much. Only finished the Saiyan Saga and reached Namek with Goku. That's it. But yeah, while I was playing it, it wasn't easy to unlock the What-If scenarios even in the Saiyan Saga. After the chapter was over, I saw the branching paths and realised that "Damn, I've missed so much."
Busy with Metaphor: ReFantazio, currently. Will finish that and then get to Dragon Age: The Veilguard, and then get to DB:SZ.