There’s probably a business model linked to pepper spray improvement. And also a delivery system that can be carried on a pack or belt. I would really like to be a good ten yards away if I had to launch a spray.
Will if you are willing to pay the price almost anything is possible.
The SCBA bottles we have at work are aluminum wrapped with fiberglass. They are pressurized to 4000 PSI. I would wager that 4K PSI would shoot a stream to 10 yards.
Such a sprayer would be heavier than a typical spray can but would reach way out there.
Change the wrap to Kevlar or other hi-tech fiber and you could get higher pressures. But also raise the cost.