all my hardware is recycled trash, so I ain't got experience with those modern 12th gens, but what worked (and phenomenally so) for my old heaps is implementing suspend-then-hibernate, a feature that's off by default and you gotta put in some leg work to make it work, especially on fedora due to zram.

this works reliably on every platform I tried - sandybridge macbooks, coffeelake and ryzen zen plus thinkpads, etc. regardless of UEFI sleep support. you leave it in standby and if you don't touch for, say, an hour, it dumps the RAM to SSD and turns off all power - zero battery drain! when you "wake" it, it restores RAM from the SSD and gives you your lock screen login and this is faster than cold boot and all your shit is how you left it!

once it works, it works like a mac - you leave your laptop for hours, days, weeks and comes back up how you left it, with the battery barely losing a percentage point.