Bugs and feature requests are stored in a GitHub Issues database.
When reporting a bug, please give as much detail as possible, including repro steps and if possible a simple code file or project that reproduces the problem. For UI issues providing a gifs or video is also very useful.
If it's a simple and uncontroversial feature it's fine to add it directly to the database. For more complex requests it's a good idea to bring it up on the Discord group for discussion. You should have received a link to the Discord group when you purchased your license.