A repo to track ideas for topics
In addition, you can use the "github issue" reactions (thumbs up) to upvote suggestions.
If you are looking for programming help, then you'll probably have better luck at on The Coding Train's Discord. Which has a number of help channels. You can also checkout The Processing Foundation's Forum which is a great place to ask about processing and p5.js. And of course Stack Overflow is great for obscure topics because the user base is so big.
Happy coding! Choo choo!!