There is a new pull request by pbui against master on the void-packages repository

https://github.com/pbui/void-packages python3
https://github.com/void-linux/void-packages/pull/22096

python3: update to 3.8.3.
Also update python3-tkinter.

A patch file from https://github.com/void-linux/void-packages/pull/22096.patch is attached