Where are you looking? I can go back and find posts from before 2019. What are you looking for? The search isn’t perfect but it’s getting better.
Are you looking for things that you yourself have posted in the past? Here's a list of your forum activity in your profile:
https://ttlc.intuit.com/community/user/viewprofilepage/user-id/5483058
To see your profile click the "heads" icon in the upper right corner of this page and then select "My Profile."