The noun handiwork can be countable or uncountable. In more general, commonly used, contexts, the plural form will also be handiwork. However, in more specific contexts, the plural form can also be handiworks e.g. in reference to various types of handiworks or a collection of handiworks.

Which is correct handwork or handiwork?

As nouns the difference between handiwork and handwork

is that handiwork is work done by the hands while handwork is work done by the hands, as opposed to by machine.

What is the word handiwork mean?

1a : work done by the hands. b : work done personally recognized her handiwork. 2 : the product of handiwork.