Since I have too much time on my hands
😀 I did a Google search out of interest and found a couple of things others have tried which worked for them :
Settings - Accessibility- Visibility Enhancement - make sure Magnification and Magnify Window are turned off
- then do a restart of the phone - hold power key for power menu and tap restart
Also someone said it worked if they triple tapped - then thereafter worked with double tap !
Also just have a look at all your accessibility settings etc to see if can see anything that might be conflicting with it
Seems different things for different people
Don't know if these will help but probably more suggestions to be found if you Google it
Good luck - hope you get it figured - is so annoying when get these sort of things not working !