Did you tap-focus on the background before taking the picture
@Gabrieltg?
And could you provide a full resolution image (Dropbox / Wetransfer / …) It’s hard to judge based on a rescaled version.
It does however look consistent with what I would expect in terms of sharpness.
I have to say that I still notice a lack of detail in images taken with the Asus Stock Camera. You can try the camera of the Lightroom App for the finest details out of any of the Camera Apps I tested.