This file is indexed.

/lib/systemd/system-preset/90-systemd.preset is in systemd 237-3ubuntu10.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#  SPDX-License-Identifier: LGPL-2.1+
#
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.

# These ones should be enabled by default, even if distributions
# generally follow a default-off policy.

enable remote-fs.target
enable remote-cryptsetup.target
enable machines.target

enable getty@.service
enable systemd-timesyncd.service
enable systemd-networkd.service
enable systemd-resolved.service

disable console-getty.service
disable debug-shell.service

disable halt.target
disable kexec.target
disable poweroff.target
enable reboot.target
disable rescue.target
disable exit.target

disable syslog.socket

disable systemd-journal-gatewayd.*
disable systemd-journal-remote.*
disable systemd-journal-upload.*