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

https://github.com/sgn/void-packages rrdtool-python3
https://github.com/void-linux/void-packages/pull/25157

python-rrdtool: rename to python3-rrdtool


A patch file from https://github.com/void-linux/void-packages/pull/25157.patch is attached