Cyclo used to make a couple cog clusters of three cogs that fit on the same driver.
The AW/Cyclo 3 cog hybrid set-up circa 1956 is what I've been running on my town bikes for decades, bought it NOS in ~1970.
With a range of 41-106 GI, nice steps and the ability to shift while coasting it has meet my requirements nicely.
It is overly complicated, combines the advantages/disadvantages of both the IGH and the derailleur, fussy, heavy, and requires advanced math to determine which lever to move in which direction to select the "next" gear. Typically British.
-Bandera