Hello, While we are not licensing experts and licensing issues can sometimes be complex, I recommend contacting a Microsoft partner for the most accurate and detailed advice: https://appsource.microsoft.com/. In the meantime, I will do my best to provide you with the information you need, and I hope it proves helpful.
It seems that SQL Server is licensed under two models:
The server+CAL model is illustrated as follows: SQL Server 2019 licensing guide
Though there are some exceptions: Windows Server | Licensing Guide
Best regards,
Karlie Weng