Its range is pretty short; traditionally such transmitters are nearly unregulated, especially in the ranges where they already massively exist, such as smart card readers.
I suppose it's the firmware that makes this device stand out, not the hardware. The hardware is very standard, unregulated, and inexpensive, AFAICT.
(This of course means that whoever needs a Flipper Zero-like device, can just build one cheaply, and flash the firmware from Github. It's the amateurs who wanted a cool-looking device who are burned.)