Azure SQL DB with custom name and with ssl cert for PowerBI Connection

I've been reading that you can assign a custom DNS alias to the database, but can someone direct me to documentation to assign a custom ssl cert so that I can use Power Bi connection to use the new Alias.  If I don't it will error out on certificate mismatch.

Example DNS name: mydb.database.windows.net

Created Custom DNS Alias: mydb.mydomain.com

(https://docs.microsoft.com/en-us/azure/sql-database/dns-alias-powershell?tabs=azure-powershell#code-example

I'm able to still access the DB using the custom Alias: mydb.mydomain.com using SSMS.  Would like to connect via Power BI as well using the alias; however, due to TLS SSL connection the certificate is mismatched.

Is there a way to apply or import custom Certificate for the Custom Alias?

Thanks

Damian