SUMMARY
I would like an option to specify amount of minutes before machine hibernates during sleep.

Also, *Energy Savings* UI is a bit convoluted having the *after sleep options* before the Sleep options. Also they are indented under *Suspend session* settings which indicates that you have to enable *Suspend session* to use *While asleep, hibernate after a period of inactivity* option which is not actually required.

My suggestion would be to create a new "Suspend-then-hibernate" option which can be chosen from a drop-down menu under *When laptop lid is closed*. After choosing the *Suspend-then-hibernate* option a new option would appear under *When laptop lid is closed* settings but before *Even when an external monitor is connected* check where user can specify amount of minutes before machine is hibernated. Similar to *Dim screen* timer settings.
 
When I looked for suspend then hibernate option it was very confusing how to set it up. This would simplify it and add an option to specify the delay.

STEPS TO REPRODUCE
1.  Go to *Settings* > *Power Management* > *Energy Savings* 

OBSERVED RESULT
Under *Button events handling* > *While asleep, hibernate after a period of inactivity* there is no option to specify the amount of minutes before system hibernates.

EXPECTED RESULT
Under *Button events handling* > *When laptop lid is closed* there is an option for **Suspend-then-hibernate** where user can specify amount of minutes before hibernation.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux 5.19.9
(available in About System)
KDE Plasma Version:  5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.6

ADDITIONAL INFORMATION
Systemd provides the **suspend-then-hibernate** command which suspends (puts it to sleep, saves the session to RAM) the machine and after specified time it hibernates (saves the session to disk).

**Differentiation from hybrid sleep:**
Hybrid sleep saves both to disk and RAM. It performs *suspend* and *hibernate* actions where as  *suspend-then-hibernate* first suspends then after some time it will hibernate.

When you use hybrid sleep, machine will suspend to RAM but you have also hibernated so in the case that battery runs out you will still have your session stored. This means that your RAM will keep draining your battery until you run out of battery. This option has its specific cases but it is not so useful when left on battery.

When you use suspend-then-hibernate, machine will suspend to RAM for certain amount of time and then hibernate and shut down, stopping the battery drainage. This option is useful when left on battery.