Finding my questions.
How do see a list of questions I've submitted over past year?
iPhone 12, iOS 17
For threads from longer than a few months ago, it is recommended to use an external search engine, with keywords like:
site:discussions.apple.com "your username"
The profile specific filters for authored threads is capped off at 2 or 3 months. These older threads are still searchable, but not through your profile at this time.