OCIS is bad for third party integration. OCIS force the use of OIDC with no workaround since the launch of OCIS few years ago.

For example, owncloud claims that it can integrate with rclone. Owncloud suggest the use of OIDC-agent which is very complicated. It also suggest enable the use of Basic Authentication which is bad for security.

They are working on the ability to create app password but the progress is very slow. Related GitHub issue here.