Adding more than five custom domains to a premium static web app

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Is there a way/ or would there be a way in the future, to add more than five custom domains to a premium static web app?

**Describe the solution you'd like**
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We are coming from Heroku, where we don't have a hard limit on custom domains. Therefore, we want to continue offering custom URLs to all of our tenants, which is well over the 5-limit that static web apps currently allow.

**Describe alternatives you've considered**
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The only alternative that I have found is to configure Azure front door in front of Azure's static web app. I have not implemented this yet, but there is documentation on this topic.

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