Moving from evdev to libinput, I cannot set mouse acceleration greater than 1

I'm currently using the i3 window manager, so I need to setup my mouse from the command line. I could previously use xset m 2/1 0 to get the mouse speed I wanted using xev. But moving to libinput driver, xset m no longer works. If I try xinput set-prop "Logitech ERGO M575" "libinput Accel Speed" 1 This just isn't fast enough and libinput won't take a number higher than 1. A couple of other posts mention chance deceleration, but my mouse doesn't have that property. All I have is the following:

xinput list-props "Logitech ERGO M575"
Device 'Logitech ERGO M575':
	Device Enabled (175):	1
	Coordinate Transformation Matrix (177):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	libinput Natural Scrolling Enabled (304):	0
	libinput Natural Scrolling Enabled Default (305):	0
	libinput Scroll Methods Available (306):	0, 0, 1
	libinput Scroll Method Enabled (307):	0, 0, 1
	libinput Scroll Method Enabled Default (308):	0, 0, 0
	libinput Button Scrolling Button (309):	8
	libinput Button Scrolling Button Default (310):	2
	libinput Button Scrolling Button Lock Enabled (311):	0
	libinput Button Scrolling Button Lock Enabled Default (312):	0
	libinput Middle Emulation Enabled (313):	0
	libinput Middle Emulation Enabled Default (314):	0
	libinput Rotation Angle (287):	0.000000
	libinput Rotation Angle Default (288):	0.000000
	libinput Accel Speed (315):	1.000000
	libinput Accel Speed Default (316):	0.000000
	libinput Accel Profiles Available (317):	1, 1, 1
	libinput Accel Profile Enabled (318):	1, 0, 0
	libinput Accel Profile Enabled Default (319):	1, 0, 0
	libinput Accel Custom Fallback Points (320):	
	libinput Accel Custom Fallback Step (321):	0.000000
	libinput Accel Custom Motion Points (322):	1.000000, 0.000000
	libinput Accel Custom Motion Step (323):	2.000000
	libinput Accel Custom Scroll Points (324):	
	libinput Accel Custom Scroll Step (325):	0.000000
	libinput Left Handed Enabled (326):	0
	libinput Left Handed Enabled Default (327):	0
	libinput Send Events Modes Available (289):	1, 0
	libinput Send Events Mode Enabled (290):	0, 0
	libinput Send Events Mode Enabled Default (291):	0, 0
	Device Node (292):	"/dev/input/event7"
	Device Product ID (293):	1133, 16534
	libinput Drag Lock Buttons (328):	
	libinput Horizontal Scroll Enabled (329):	1
	libinput Scrolling Pixel Distance (330):	15
	libinput Scrolling Pixel Distance Default (331):	15
	libinput High Resolution Wheel Scroll Enabled (332):	1

I found [a blog post about using custom motion points](https://who-t.blogspot.com/2023/01/libinput-and-custom-pointer.html) but if I try to use those settings and change the Step to 2, the mouse is just really random and janky. I don't understand from this post how to simply change the acceleration to 2x. [This post indicates](https://askubuntu.com/questions/1267142/how-to-set-change-i3wm-mouse-speed-not-acceleration) I can use the "Coordinate Transformation Matrix". I tried changing the default so the last number was 0 and still no speed change. Why is libinput limited from 0,1? This very basic thing I could do with xev seems complication and/or impossible on libinput!