busywork

[biz-ee-wurk] /ˈbɪz iˌwɜrk/
noun
1.
work assigned for the sake of looking or keeping busy.
Origin
1840-50; busy + work
Idioms and Phrases with busy work

busy work

Activity meant to take up time but not actually be productive. For example, We have to put in an eight-hour day, even if we do nothing but busy work. [ c. 1840 ]