Just copied and pasted my comment from another recent post about Authelia.

After recently trying Authelia I gave up and moved to Authentik. Very much appreciate the all in one functionality of it. The company even paid a YouTuber to make a bunch of useful step by step tutorials and they have been invaluable. They also have a number of SSO integration instructions for various software. I highly recommend giving it a try if you’re in the market for an easy enough self hosted SSO and proxy password system.