Pdf not fitting for MAC M1 chip

Dear All,
              Actually i installed ios app in Macbook Pro M1 chip device. In this mac pdf is not fitting. right side having lot of space. Event hough if i change frame of mac app not adjusting pdf. 
navigation bar changing frame base on frame of mac app. But pdf not changing. I think if we are implementing auto-layout we can achieve this. I tried to implement auto-layout, i did for scrollview even though its not working. Please help me to achieve this. 

Please see attachment. Red color is scrollview green color is PDF.

Thanks in advance.