I think that when Apple pivoted to "Apple Silicon" or basically the M series chips they realized that they should pivot to video games also. Once iOS supported an App Store it came out of the gates organically with people making video games for the platform . Unfortunately they never really followed through with helping game developers or any meaningful QC regarding monetization so you have a lot of good games and a whole lot of bad games. Also, Warframe when they made a switch port they figured out they could make an iOS port which really caught on in Japan.