perfect laptop ;)

[churumbelo]

I've using Lenovo X1 Carbon for years; that matches partly your needs :
under 1.2kg -> 1.14 kg
under 14" inch -> 13.6
touch screen -> not mine but yes for Gen11
USB-C power delivery port on each side -> 2 USB-C on one side
USB-A port -> 2 USB-A
RJ45 port -> none (but I've a USB-C -> Ethernet in my bag)
single-handed lid opening -> yes
upper-right corner Delete key -> yes
airflow inlets and outlets not located at the bottom -> no
backlit keyboard -> yes on Gen11
linux support -> yes

really a good choice, very easy to carry, use, open, close, and somehow quite resistant (using it 40 hours a week, since 2021, brought it 2 Africa twice for 1 week each time, no problem at all).

Mine is an older gen and has touch screen. I think it depends on the options when you but it. Backlit keyboard, all generations have that if I am not mistaken.