Self-signed certificate in SQL Server

I can not find detailed information about SQL Server self-signed certificate. I thought that the cert is generated with new date every time restart happens. ChatGPT told me that this certificate is only generated when installation happens. Is that true or he is hallucinating? Does anybody know will it be regenrated when expires? And for what period is it issued? 10 years? How to check that information? **EDIT:** Sorry, I wasn't clear enough. I'm not talking about certificates that are generated inside SQL Server. I'm talking about the certificate that is used to encrypt traffic between the client and the SQL server. If you don't set your own certificate in SQL Server Configuration Manager, then self-singed is used.