I found a work-around for the missing 16:9 HD option.
There is a camera app called “Camera MX”. In this, under
settings (3 dots)-> settings
you can choose maximum 4:3 resolution. Then, under
settings (3dots) -> Photo resolution
you can choose 4:3, 16:9 or 1:1. 16:9 gives you a resolution of 3264x1836 pixels.
Well, it is a workaround for now. It would be cool if we had that resolution available for all cameras. As video resolutions can be set in
there should be a another config file giving more resolutions for pictures as well. I haven’t found any yet, but that’s what I hope for…