Hello, I use Nothing phone. double tap lock and single tap screen wake are default. I am attaching a screen recording, that it is working fine on latest update. I request you to try resetting the phone which may solve the problem.
Incase resetting doesn’t rectify the problem, try removing the screen protector and try.
In case removing screen protector also doesn’t solve the problem, go to settings –> System–> Feedback.
Raise your concern and attach the required media(record your screen, pls enable taps).
Thanks & Regards,
Phone(2) Use