It has been '0' days since I wrote 'Oath' when I meant to write 'OAuth'. Such a tempting not exactly a typo, more a mind slip.
(Also, don't ask me to describe the differences between OIDC and OAuth2, and I suspect that all sorts of documentation blurs the two and talks about 'OAuth2' when it really means 'OIDC'. For example, I'm not sure Grafana would be happy with a pure OAuth2 provider that didn't add the extra OIDC stuff, although maybe it would be.)