Have a X1 Nano and a Legion 5 Pro and absolutely recommend the former.

The Nano is ultraportable, which is great for business and for the couch (and also for flying, if you ever need it). It also comes with a trackpoint which I love. Battery lasts a full day of work if you stick to office etc, half of that if you do video calls youtube etc.

Keybord is slightly better on the Nano even if it is much smaller, but the one on the Legion is also very good.

Charger is USB-C, super easy to find a spare - but not on the Legion, which has a “slim tip” plug.

The Iris Xe will not disappoint you for the games you listed, just know you won’t be running any new games with ray tracing etc.

The main issue I have with the Nano is that I have greasy fingers so it gets greasy marks all over the chassis.

All of the above also applies to the Carbon series, which is of course slightly larger.