The welcome package (includes eos-welcome) is under constant development, as soon as new ideas arise. As Joe already mentioned, it is built on top of yad features and bash language, so it is rather limited in terms of graphics, but yad works so far quite well.
So if you have ideas about possible new features, that would help. I’m not sure whether you’d like to learn yad (especially if you are not yet familiar with it), but e.g. python is OK too. Welcome is a collection of various ideas and tools that help new users get started with EndeavourOS. It is also useful for more experienced users, because it helps with some essential maintenance operations etc. So the purpose of it is to help all users with some essential questions.
But now you seem to start doing stuff with ARM and that’s great!
Welcome aboard! 