I can’t zoom with double finger vertical scroll on my Alienware,
but I can scroll any website or other applications.
My Alienware uses Synaptics to manage touchpad and pointing devices.
I can zoom in with ctrl- but can’t zoom out with ctrl+
I have an Alienware R13 and have issues two finger scrolling with trackpad in Touch. Fortunately, I always carry a bluetooth mouse, and when I don’t, both ctr- and ctrl+ work for me.
Otherwise, I really like the R13, especially with the manual switch between iGPU and dGPU on the non-OLED model.