Touchpad
From NixOS Wiki
Clickpad issues
If your touchpad physical click (or clickpad) like for Lenovo Thinkpad or MacBook touchpad is disabled after a kernel update, this might be due to a kernel bug on the 6.1+ Linux.
To restore the previous behavior, add to your Nixos hardware configuration:
# Avoid touchpad click to tap (clickpad) bug. For more detail see:
# https://wiki.archlinux.org/title/Touchpad_Synaptics#Touchpad_does_not_work_after_resuming_from_hibernate/suspend
boot.kernelParams = [ "psmouse.synaptics_intertouch=0" ];