Don't know much about HA (it looks like Bitwarden does this through Helm https://bitwarden.com/help/self-host-with-helm/ https://bitwarden.com/help/self-host-wi

Don't know much about HA (it looks like Bitwarden does this through Helm https://bitwarden.com/help/self-host-with-helm/ https://bitwarden.com/help/self-host-with-helm/), but backup is a matter of simply copying files: https://bitwarden.com/help/backup-on-premise/ https://bitwarden.com/help/backup-on-premise/