Amazon.com: Miuzei Raspberry Pi 4 Touchscreen with Case Fan, 4 inch IPS Touch Screen LCD Display, 800x480 HDMI Monitor for RPI 4b 8gb/4gb/2gb with Touch Pen (Support Raspbian/Kali/Octopi/Ubuntu)- No Raspberry Pi :
How to setup the Raspberry Pi Official 7 Inch Touch Screen with your Raspberry Pi 4 Model B