@mrhyk93 well actually, I did get openID connect to work with cloudflare access to cloudron.
the only caviot is that it can only except 35 characters for the secret.
they also except Google authentication, Facebook, and GitHub.
however, when using duo, that is, for cloudflareaccess, only supported for SAML.
while duo has generic OIDC, AD or SAML needs to be configured, and if i'm correct, cloudron, by itself, does not hold AD, just things like lDAP, with no actual AD.