When using the OSMO mobile 3X3 panorama mode you have three quality settings.
On my iPhone SE that works out to Low 2030X947, Medium 2681x1253 and High 4467x1957.
At the HIGH setting it is still less then the resolution of a single image from the camera.
The whole idea of Panorama is not just to give you a wider field of view but to allow you to get a higher resolution image by combining the data of 9 images into one.  I know that will not give you an image of 9 times more size but it should give you something more like 4 times more resolution.  DJI needs to address this in a software update.

I agree, the multi image pano shots are not the image quality I was excepting to see. It might take 3 times longer to stitche them in the software but I'd wait if the images were 3 times the quality/resolution.

Stitching failure in 3 x3 panorama is always way  too common in myu opinion .180 deg  and 330 deg  works just fine but 3 x3 which I prefer usually fails .