Not to mention that he’s trying to move away from mobile for future games. It’s hard to work with and lots more rules and regulations to fight.
ETA: Mobile gamers are like why would it be hard if other games do it all the time, but Stardew is set up differently than mobile games hence why so hard to develop in for him in the first place. The same reason why most pc and console games aren’t released onto mobile. It’s not just CA.