Hey @jonesbusy ,
Sorry for the long delay to get an answer.
Actually, we released OIDC support for SonarQube Cloud about at the same time of your last message: 🚀 New: OIDC SSO for SonarQube Cloud Enterprise now in general availability!
I hope this covers you needs 
Cheers,
Aurélien
ps: enhancing the experience for MCP authentication is on our roadmap as well