Yes, There’s Plenty of Decolonization Fiction: A Starter List

Yinka-Shonibare-MBE-5
Buru Quartet (1980-1988) by Pramoedya Ananta Toer
The Buru Quartet (1980-1988) by Pramoedya Ananta Toer
This Mournable Body (2018) by Tsitsi Dangarembga