PicoVGA is a wonderful project aimed to use a Raspberry Pi Pico as a VGA graphics card. It was created by Miroslav Nemecek (in 2021), and you can visit his website and the original project webpage at the following links:
Main website:here PicoVGA website:here DIY webpages:here Miroslav Nemecek's Github:here PicoVGA Github:here
For building this, we need some electronics components. I got most of them through AliExpress (although it's a matter of luck to get integrated circuits that works well.) I think it's better to get them from a legit electronics supplier near your home or city.