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

https://github.com/kevcrumb/void-packages randomx
https://github.com/void-linux/void-packages/pull/26148

randomx: add package v1.1.8 and librandomx
*randomx* contains binaries for benchmarking a machine for RandomX algo
*librandomx* provides library for using the algo (for example from a mining software)

A patch file from https://github.com/void-linux/void-packages/pull/26148.patch is attached