I came across the article "Want to Build a Laptop Computer Using the Raspberry Pi 400" on the Switch Science Magazine and found it intriguing, so I decided to give it a try.
I purchased the display from Amazon. Haude 8.8-inch Strip H088IPW1 Monitor 1920X480
After taking measurements, I created a case using a 3D printer.
Initially, I attached it to the Raspberry Pi 400 just like in the Switch Science Magazine article, but found it inconvenient to use, so I created a stand.
Although I made it, the display was too small to be practical. However, it was good practice.