Hi Shafin, I am Paulo, an Independent Advisor willing to help.
Your computer most probably supports modern standby that is why you can only have the Balanced power plan. Modern standby replaces the legacy standby (S3) in most computers nowadays.
You can confirm if this is the case when you enter powercfg -a in the command prompt. If it says "Standby (S0 Low Power Idle) Network Connected" then modern standby is active.
https://www.tenforums.com/tutorials/145891-how-...
Unfortunately, the registry method CSEnabled won't work on newer laptops. There's no safe way that I can think of to get back the old power schemes as your PC's manufacturer most probably removed any S3 code from BIOS.
You might as well check this article about Modern Standby vs S3
https://docs.microsoft.com/en-us/windows-hardwa...
You can also click on your battery icon and see if there is a slider there so you can set it to Best Performance.
https://docs.microsoft.com/en-us/windows-hardwa...
I hope this info helps