Can I set the holiday lock screen with one plus 9r?

Of course. One plus 9r setting holiday lock screen is a function of mobile phone, which can be set by yourself. You need to operate it in the phone settings, enter the phone settings-display-holiday wallpaper, turn on the switch, and the phone settings-general-security and privacy-screen lock mode, and select the screen lock mode other than "No/No screen lock". In Settings-Display-Select the system itself. Screen lock is a computer screen lock and a mobile phone screen lock.