I believe you want to use a specific driver library. On a specific driver chip.
But don't know how to tell the library how to tell the driver chip what resolution you want the chip to use on the display.
I could not find the command in the livrary.
I assume that you think the chip has only one resolution and that you do not need to tell what resolition to use.
Based on the simple fact that no one else has tried to offer suggestions that you have a very specific need.
That is why i suggested that you use the library chat room. To get help from those that wrote the library.