New comment by TinCanTech on void-packages repository

https://github.com/void-linux/void-packages/issues/23413#issuecomment-654389532

Comment:
Note: 
1. OpenVPN does **not** officially support LibreSSL. (It may or may not work)
1. If LibreSSL 3.x is equivalent to OpenSSL 3.x then it is, at best, currently experimental.
1. ProtonVPN obviously do not provide support for this.

A much more suitable test would be for you to setup your own server.