Problem with smartphone resolution

Hi guys! I am trying to make a game for smartphone, you already helped me with the zoom mechanic but now I have one more problem. The resolution is 1280 x 720 and I added the option to adapt the width to the screen. On the PC the game looks fine but when on smartphone it’s too small, anyone knows how to keep the same dimentions while adapting to the screen smartphone without having the black bars on the sides?
My goal is to make the game playable for all phones.

PS: at the beginning of the game it plays a scene when it zooms

Have you tried the other setting, “adapt the height”?
There is no universal resolution, unfortunately, but there are probably dozens of topics here on the subject of smartphone resolutions.