but if I try to configure the clients then they won’t auth

admin:
  endpoint: dns:///flyte.ourserver.com
  insecure: false
  clientId: flytepropeller
  clientSecretLocation: /userhome/.flyte/secret
  authType: Pkce

have you tried

authType: ClientSecret

? If I understand you correctly you want to auth with the flytepropeller client secret.

So this is fixed for us now, and I realise that this config snippet was off as we were using ClientSecret but the issue was more around getting all the config in the deployment lined up correctly as well