I think probably the best solution for this type of system (at least for my case) is to setup suspend then hibernate when closing the lid for laptops. This way it doesn’t drain the battery overnight and can use that new sleep mode for a limited time and switches to hibernate.
I did not find another good way to switch back to the S3 sleep mode. Don’t know why manufacturers lock that option out of bios for the user for certain laptop model, that’s such a bummer.
The only options are bios patches, and to be honest I prefer not fiddling with that, could lead to potential failure and brick my whole system.