I can now attest to the operation of the current status of the Weno eRx feature in the codebase. It does work out of the box. Register for EZ integration at https://online.wenoexchange.com/.
Pharmacies will for now have to be manually entered into the pharmacy section until the auto population is done by @kkappiah . If he is working on it.
https://www.open-emr.org/wiki/index.php/OpenEMR_ePrescribe#Weno_Exchange