I know, the current way to add custom component require a bit of setup.
There's a quicker way though, that is the "legacy" version, but still very good IMHO, that allows you to add webapp code to create your own component. Just drag the Custom Component component you find in the component list and add the code (HTML/CSS/JS).
Here the doc to learn how to make the component communicate with Retool:
There is no dummy custom component under component library that I can manipulate according to my needs. And the explained method under legacy (what I understood) is for local hosted. And there is no clear instruction anywhere how I can build my custom component on my retool cloud hosted environment
Thank you for the information. I didn't it but the app was on another tab open and I didn't refresh that tab seems like that was the cause of the issue. Now I can see the custom component. Thank you very much for your support