There are many 3D Printer 32 bit controllers. Some are quite compatible with there 8 bit counterparts.

This means that the same firmware can be used on both so that it can be complied as 8 bit or as 32bit.
The firmware is still being developed and there are still some bugs though you can look at a list here.


https://hackaday.com/2019/05/10/a-32...ur-3d-printer/