I’ve not looked for an LDAP solution but stuff like this is why i went with authentik over other solutions. Because authentik has LDAP built in, i can use this when needed (jellyfin) but then use openid for other apps (which us superior in almost every way for home lab use)

There are auth libraries that you can just plug into your app so you don’t even have to worry about that part yourself and just focus on the app

https://authjs.dev/getting-started