Subdomain support for External URL for Marketplace Apps for each Project

When a application with external hosting option is enabled from the Providers, we are forced to go placeholders only at path for example,<PANTARIS_ORGANIZATION_ID>/<PANTARIS_PROJECT_ID>

Is it possible today to have the External URL Configured as https://<PANTARIS_PROJECT_ID> What is the possibility here to do something like this?

This will be possible in one of the upcoming releases. - Release Notes

The link seems to be broken. Could you update the link or provide a timeline when we can expect the domain based routing support. Thanks in advance