I have a Legion 5i Pro (new, only a month old or so) and after I let it go to sleep on battery settings for about an hour today, the 2nd SSD (Samsung 990 Pro NVME) just doesn't appear anymore, and in the device manager it shows a Code 10 and An I/O adapter hardware error has occured.
Plus after restarting to see if it fixes the issues, the BIOS boot and Windows take ages to startup (BIOS was nearly 5 minutes, Windows was over a minute)