Postings retained by this site

Once before, I complained about the loss of postings. Today, it seems that Apple has now also purged most of those that were created AFTER the mass wipeout. Now, none of my postings more than one month old are shown. Now, only five of my postings are shown.

Am I missing something? Could the postings that seem to be missing be filed elsewhere? Can they be recovered?

I should mention that I installed Catalina today. Could that have anything to do with the missing postings?