Getting multiple "login attempt failed" warnings

If they are using one of the HA apps, just get it to save the password so they don’t have to keep entering it. Also, have the IP ban only after 3 failed attemps. Surely your family won’t mess up the password 3 times in a row…

Just don’t ban internal (wifi) logins. Docs

Did you manage to stop the login failed errors?

Nah, it’s just login attempts through the proxy. I run nginx proxy manager.