@lkroll , @Br1

Thanks for your help, this works perfectly.

code_textphablet@ubuntu-phablet:~$ systemctl --user status enable-doubletap.service
● enable-doubletap.service - Enable Double Tap to Wake on Unity Screen after D-Bus is ready
     Loaded: loaded (/home/phablet/.config/systemd/user/enable-doubletap.service; enabled; vendor preset: enabled)
     Active: active (exited) since Thu 2024-01-04 15:35:53 +03; 20min ago
   Main PID: .......