There should be a setting in BIOS for sleep state that lets you choose between “Windows sleep” and “Linux sleep”. I know I have to set that to “Linux sleep” on my P14s gen 2 AMD or it wakes up immediately after going to sleep. Updating BIOS and the other firmwares might help too.
However I have a gen 7 from work running Windows that often fails to wake up from sleep or hibernation, and I have to resort to poking the reset button to get it to respond. Coworkers report similar troubles so I think it may be a cursed model.
That said, I’m running OpenSuSE Tumbleweed KDE on my P14s and an X1 gen 5. Everything works smooth out if the box on both machines except for the fingerprint sensor on the gen 5 which doesn’t have mainline fprintd support in any distro.