I"m running Android 10, and I've not had this problem/issue with the lock screen on any previous iterations of the OS.
In the past, When the on/off switch is pressed, this enables lockscreen and the system goes into a wait state. The screen blanks and stops monitoring gestures or taps. It needs the on/off switch or the finger recognition scanner to come back on.
What I'm looking for
A setting that will switch the screen off until I hit the on/off switch, preferable not the finger scanner