suggestion

[manmohanmishra]

Please add any feature to the lock screen without using button like double tap to lock or anything else

[Ehsank]

Enable assistant menu, this is best way ,by this option you can also perform other important task such as screen off, navigation, sound, screen rotation, power off menu, notification panel and also specific app option available
To enable assistant menu just go to settings>>accessibility >>interaction and dexterity>>assistant menu>>enable and also click on it and enable>> assistant plus menu

[SukhveerJangra]

hi u need to use the apps use can be granted bt assistance menu.
i am using as shown in screen shot