[taxyz]

Lenovo has a tool for exploring their bios for particular systems: https://download.lenovo.com/bsco/index.html

Not sure why the subdomain is download because you do not have to download anything.

This particular laptop supports s3 sleep (under config > sleep state).

[kristianp]

Just having a look at that, it's a simulator for BIOS their setup utils. There's a sleep state called "S3 Linux" in the P14s Gen 3, described as: "optimised sleep state for versions of linux that are not compatible with suspend-to-idle"