There is an updated pull request by st3r4g against master on the void-packages repository

https://github.com/st3r4g/void-packages nicotine-python3
https://github.com/void-linux/void-packages/pull/23577

nicotine+: update to 2.0.0
Ported to python3

A patch file from https://github.com/void-linux/void-packages/pull/23577.patch is attached