As explained in previous posts the current tinySA design with some small HW and SW modifications can go up to 3GHz (using harmonic modes) with a HUGE disclaimer.
It can be VERY difficult to interpret the measurements and we expect MANY customers complaining so it is NOT a feasible product.
I have studied how to do a more robust design up to 2GHz or 4GHz and if you are willing to drop the bottom 300MHz (0-300MHz) it is feasible for an acceptable cost.
But for now not on the priority list.