Maybe typo (or something lost in translation) ?
Wouldn't it be too short even for a "normal" circular 180° fisheye on fullframe?
(Though there are several variations of optical projections/corrections)
This makes total sense: Shooting streeview half spheres with one shot you need more than 180°.
Those Googles, ... do it today with multiple camera arrays. One single shot with a 45MPX sensor facing the zenith can do the job.
Every of those Google, Garmin, Apple, ... cars/rigs bings back terabyte of data day by day to be spherical stitched.
You probably can heat towns withe the power wasted for processing.
This is a professional market worth to be targeted.
This market is selling by far better than i.e. tilt/shift or things like this.
A lens for this use case can cost the price of a car and will be sold.