To me the entire 68K family were always 32-bit CPUs because of the 32-bit data registers. You work with it and write assembly for it in a transparent "32-bit way" like any other 32-bit CPU, with no additional care or work necessary for the programmer in regards to the 68000's external data bus being only 16 bits wide and behind the scenes doing 32-bit transfers in two steps.

Also worth nothing that it's just the early 68Ks that came with a narrow external data bus. The 68020 and onward, which were also used in the Amigas, have a 32 bits wide data bus.