Mobile resolution problem

Hey, I am having a problem with resolution in my latest mobile game. In my last game my resolution was 720 x 1280, and the game worked perfectly fine on my brothers phone, my phone and probably all my friends phones. Now in my latest game I am having the same resolution, but when I ran it on my brothers phone (google pixel) the game is waaay to small. And that was happening with my archived project as well. I tried putting it to free aspect but it does not work as well. What am I doing wrong?

21. Unity Scale Game To Different Screen Resolution/Size - Unity Android Game Development Tutorial - YouTube fixed the problem