where is old forum? How do I check my questions I have posted in the last several years?

Hi there! What you said above is correct; some (most viewed/popular) Forums content has been migrated to re:Post. Additionally, you can still access AWS Forums until December 9th, here: https://forums.aws.amazon.com. After December 9th, AWS Forums will become read-only and on April 1st, 2022, will redirect to re:Post. Hope this helps!

The good news is that the old forum posts are imported in re:post under "My Dashboard" tab. The bad news is that I will have to learn the new UI (User Interface) that is different than the old one.