I did try to setup ODK Central on CentOs 8. In my experience, I discovered all the scripts to build ODK Central are based on Debian Linux. I broke many scripts trying to customize them to RHL. I never succeeded to setup ODK Central.
But would happy to learn from a successful RHL guru.
I seem not to get how the installation worked for you. For example, the command to install and setup Postgres is debian-based. So how did this work in CentOs 8?