Unbelievably lagging, fps dropping and screen stuttering while playing PUBG global. Previous version of iPhones were handling this game without any issue. How can the most powerful and new phone doing this? please help….

Dear developers, Is it possible to limit frame rates at 120 fps rather than 60 or have both options for iphone 13 pro max please. At the moment due to adaptive frames some top end games on this phone is painfully lagging and unpredictable. many thanks