This already exists. I got a Thinkpad T14s 2-in-1 last year from Lenovo, and it shipped with Ubuntu, which made the price around $50 cheaper if I recall. I replaced it with Debian, of course, but the battery life is fine and it is a quiet machine.
I also purchased the T14s Snapdragon two years ago, and it gets longer battery life (if you just use a terminal only, the battery life remaining will sometimes say 20 hours, but it's more like 14-15 realistically). However, it can get uncomfortably hot on the left edge at the speaker. The T14s 2-in-1 (Intel) does not have any hot spots, though.
I also purchased the T14s Snapdragon two years ago, and it gets longer battery life (if you just use a terminal only, the battery life remaining will sometimes say 20 hours, but it's more like 14-15 realistically). However, it can get uncomfortably hot on the left edge at the speaker. The T14s 2-in-1 (Intel) does not have any hot spots, though.