The Panasonic 12-32mm might not be a great lens

I took some pictures today, making sure the new SD card works. The UV filter is probably fine.

But even lowering the aperture more, around f6, instead of f5.6, it’s possibly soft in certain areas. And that’s at 12mm. Where the focus is, it seems to be fine.

Is the lens stabilization on or something? I thought I could only use it if it had a switch, it doesn’t.

There might be a setting to enable it, it’s on auto, so shouldn’t it be using the IBIS?