I would like to know if it is possible to use a single license key on two websites: the production version and the test version, on two different test domains. After creating a fully functional, stable version of the website, the product key would be assigned to only one domain. I have purchased product keys for HivePress Statistics and HivePress Tags.
You can use the license key on both your production and test websites, particularly if they’re subdomains. Just make sure to remove the license key from the staging site once the live version is ready, since continuous update requests from multiple sites may eventually cause the key to be blocked. For details on the migration process, please check this guide: Migrating your WordPress website to a different host and domain | Learn WordPress