Questions about Lenovo IdeaPad 5 2-in-1

Yes, the Lenovo IdeaPad 5 2-in-1 (14", Intel Core Ultra 5 225H, 83KR001QMZ) has a backlit keyboard.

Yes, the pen is supplied

The screen of this model is not OLED; it comes with a 14" WUXGA (1920 x 1200) IPS touchscreen panel with 300 nits brightness and 16:10 aspect ratio. Although there is an OLED option for the IdeaPad 5 2-in-1 series, this specific configuration features an IPS display, not OLED.