I have a selection of micro four thirds primes. Tiny, they are. When there is a prime on your camera you take more care taking photos.
Is that an actual 7mm focal length or 35mm equivalent?
The big difference is depth of field. If you like the Leica style (shoot everything wide open and feel the bokeh, man), a phone won't cut it. Some of them do Gaussian blur, but that's like astroturf. I tried it on my S22 and it is laughably crap, with a sharp bit of background left around the subject.