YMMV. I have a Lenovo X1 Extreme that comes with a 105w brick (though I also have an 80w USBC brick for backup.) I've had mixed results with different planes and liveries:
- Cathay A350-900 and 1000: Both work
- Cathay 777-300: 80w works
- United 777-200 and 767-300: None work
- United 787-10: 80w works
I'm flying JAL this summer, so I'm curious as well.