How to change natural scrolling in Unity 20.04?

I've tried the method mentioned here, using xinput:

sudo xinput set-prop 12

which gives

Device 'SYNA8018:00 06CB:CE67 Touchpad':
Device Enabled (189):   1
Coordinate Transformation Matrix (191): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
libinput Tapping Enabled (343): 0
libinput Tapping Enabled Default (344): 0
libinput Tapping Drag Enabled (345):    1
libinput Tapping Drag Enabled Default (346):    1
libinput Tapping Drag Lock Enabled (347):   0
libinput Tapping Drag Lock Enabled Default (348):   0
libinput Tapping Button Mapping Enabled (349):  1, 0
libinput Tapping Button Mapping Default (350):  1, 0
libinput Natural Scrolling Enabled (327):   0
libinput Natural Scrolling Enabled Default (328):   0
libinput Disable While Typing Enabled (351):    1
libinput Disable While Typing Enabled Default (352):    1
libinput Scroll Methods Available (329):    1, 1, 0
libinput Scroll Method Enabled (330):   1, 0, 0
libinput Scroll Method Enabled Default (331):   1, 0, 0
libinput Click Methods Available (353): 1, 1
libinput Click Method Enabled (354):    1, 0
libinput Click Method Enabled Default (355):    1, 0
libinput Middle Emulation Enabled (356):    0
libinput Middle Emulation Enabled Default (357):    0
libinput Accel Speed (334): 0.000000
libinput Accel Speed Default (335): 0.000000
libinput Left Handed Enabled (339): 0
libinput Left Handed Enabled Default (340): 0
libinput Send Events Modes Available (312): 1, 1
libinput Send Events Mode Enabled (313):    0, 0
libinput Send Events Mode Enabled Default (314):    0, 0
Device Node (315):  "/dev/input/event5"
Device Product ID (316):    1739, 52839
libinput Drag Lock Buttons (341):   <no items>
libinput Horizontal Scroll Enabled (342):   1

Then, using the following works to reverse scrolling:

sudo xinput set-prop 12 327 1

However, this isn't permanent and reverts after a reboot. So I've tried the following:

sudo xinput set-prop 12 328 1

This should put the default as natural scrolling, but I get the following errors:

X Error of failed request:  BadAccess (attempt to access private resource denied)
Major opcode of failed request:  131 (XInputExtension)
Minor opcode of failed request:  57 ()
Serial number of failed request:  20
Current serial number in output stream:  21

Even though I used sudo?? How to enable it anyway? Or does there exist another way to enable natural scrolling?