Touchpad and scrolling issue on Gnome

Hi

I am using Fedora 31 and I have problems with my Touchpad on Gnome Desktop: the two-fingers scrolling is two sensitive and jumpy. On the GUI, there is not option that let me control this. Here are the informations about the touchpad using libinput listdevices:

Code:Device: ETPS/2 Elantech Touchpad
Kernel: /dev/input/event4
Group: 10
Seat: seat0, default
Size: 98x67mm
Capabilities: pointer gesture
Tap-to-click: disabled
Tap-and-drag: enabled
Tap drag lock: disabled
Left-handed: disabled
Nat.scrolling: disabled
Middle emulation: disabled
Calibration: n/a
Scroll methods: *two-finger edge
Click methods: *button-areas clickfinger
Disable-w-typing: enabled
Accel profiles: none
Rotation: n/aand the output of xinput command:

Code:WARNING: running xinput against an Xwayland server. See the xinput man page for details.
a Virtual core pointer id=2 [master pointer (3)]
a a^3 Virtual core XTEST pointer id=4 [slave pointer (2)]
a a^3 xwayland-pointer:16 id=6 [slave pointer (2)]
a a^3 xwayland-relative-pointer:16 id=7 [slave pointer (2)]
a Virtual core keyboard id=3 [master keyboard (2)]
a^3 Virtual core XTEST keyboard id=5 [slave keyboard (3)]
a^3 xwayland-keyboard:16Any idea, suggestion or comment is welcome
Thanks in advance